guesstimate
noun /ˈɡestɪmət/
  /ˈɡestɪmət/
 (also guestimate)
 (informal)- an attempt to calculate something that is based more on guessing than on informationTopics Doubt, guessing and certaintyc2More Like This Blended or portmanteau wordsBlended or portmanteau words
- alcopop
 - breathalyser
 - bromance
 - brunch
 - chillax
 - chugger
 - docusoap
 - edutainment
 - greenwash
 - guesstimate
 - infomercial
 - mechatronics
 - metrosexual
 - mockney
 - motel
 - multiplex
 - pleather
 - podcast
 - robocall
 - simulcast
 - sitcom
 - smog
 - staycation
 - telethon
 - televangelist
 - workaholic
 
Word Origin1930s (originally US): blend of guess and estimate.