astoundedas‧tound‧ed /əˈstaʊndɪd/ adjective 
Examples
She was astounded by his arrogance.► see thesaurus at surprised
ExamplesEXAMPLES FROM OTHER DICTIONARIES
Thesaurus- I was astounded at the depth of understanding the children showed.
- Again he caught a glimpse of Mrs McIver's astounded expression, this time from the safety of her first floor window.
- Petion looked astounded in a repulsed sort of way.
- Staff at Cornell College were astounded by the generosity of the unexpected bequest.
- The whole audience was astounded and it didn't go down very well.
- When the assistant worked out the overall cost I was astounded.
THESAURUS► surprised
very surprised or shocked SYN astonishedastounded by/at having the feeling you get when something happens that you did not expect: · I was surprised to see her again so soon.· I’m really surprised that he remembered my birthday.· Nobody was surprised when they split up.· a surprised expression
► amazed [not before noun] extremely surprised, especially by something good or by something that seems hard to believe: · I’m amazed that he survived.· You’ll be amazed when you see the difference.
► astonished extremely surprised: · He was astonished by how much she had changed.· an astonished look
► astounded extremely surprised or shocked. Astounded sounds a little more formal and a little stronger than astonished: · She was astounded by how much it cost.
► staggered/flabbergasted/dumbfounded [not before noun] extremely surprised or shocked: · ‘What?’ I said, utterly staggered by his answer.· She just sat there looking flabbergasted.
► stunned so surprised that you do not know what to do or say: · I was too stunned to protest.· Everyone seemed stunned by his outburst.· They listened in stunned silence.
► speechless so surprised that you cannot speak: · I was speechless when I heard that I’d won.
► taken aback [not before noun] surprised by what someone says or does, so that you are not sure how to react: · I was a little taken aback by her question.· Sharpe was somewhat taken aback by the girl 's directness.
► nonplussed formal surprised and a little confused: · She was nonplussed by such an odd question.
► gobsmacked [not before noun] British English informal extremely surprised – a very informal use: · I was absolutely gobsmacked when they told me I had passed.
Longman Language Activatorsurprised► surprised if you are surprised by something that happens, you do not expect it, so it seems strange or unusual: · I was really surprised when I passed my driving test first time.· Carrie looked surprised. "I didn't expect to see you here!"· We couldn't help laughing at the children's surprised faces.surprised to see/hear/learn etc: · We were surprised to see Drew's picture in the newspaper.surprised (that): · I'm really surprised that he remembered my birthday.surprised at: · When I saw him again, I was surprised at how much older he looked.surprised by: · Julia seemed a little surprised by my question.pleasantly surprised (=surprised when something unexpectedly good happens): · His exam results were great - we were all very pleasantly surprised.
► amazed use this about something that surprises you so much you almost cannot believe it: · Liz was amazed when she found out how much dinner had cost.amazed that: · I'm amazed that the bank keeps lending him money.amazed to see/learn/find out etc: · We were amazed to see John looking so well, so soon after his operation.amazed at/by: · She couldn't help feeling amazed at his stupidity.amazed by: · You'll be amazed by how much progress we've made.
► astonished/astounded extremely surprised by something that happens, because it is very unusual or strange: · Mark was astonished when he read the message - what on earth could she mean?· We climbed out of the hole right in front of two astounded policemen.astonished/astounded (that): · It was an extremely nasty accident and I was astonished that anyone had survived it.astonished/astounded at/by: · Everton admits to being astounded at the popularity of the book.astonished/astounded to hear/see/discover etc: · The whole town was astounded to hear of a plan to build an office building right next to the lake.
► be taken aback to be so surprised or shocked by what someone has done or said that, for a moment, you do not know what to say: · I was taken aback to find an elderly woman sitting inside the door of the men's room.be taken aback by: · I was completely taken aback by his aggressive and unreasonable attitude.
► startled especially written surprised and a little frightened or worried because of something that has suddenly happened or something that someone said: · "Have we met somewhere before?" The man looked startled for a moment.startled by: · They were startled by a sudden flash in the sky.
► flabbergasted informal so surprised by something that has happened that you do not know what to say: · The delivery men just left the furniture in my front yard. I was flabbergasted.flabbergasted at/by: · Doctors said they were flabbergasted at the decision to close the hospital.
► can't get over if you can't get over something that has happened, you are so surprised by it that you cannot believe it: · Madge couldn't get over how much Joe had grown since she'd last seen him.· I can't get over how much she eats - why doesn't she gain any weight?
► can't believe especially spoken say this when you are very surprised by something because it does not seem possible: can't believe it: · I can't believe it! Jane and Richard are getting married.can't believe (that): · She was a brilliant pianist -- we couldn't believe she was only 15.can't believe your eyes/ears: · The letter invited me to fly first class to New York for an interview on Monday - I could not believe my eyes!
She was astounded by his arrogance.► see thesaurus at surprised