ultracautious
adjective
ul·tra·cau·tious ˌəl-trə-ˈkȯ-shəs 
: extremely or extraordinarily cautious
an ultracautious driver
Word History
First Known Use
1853, in the meaning defined above
ultracautious
adjective
as in ultracareful
Synonyms & Similar Words
Relevance
- ultracareful
- deliberate
- forethoughtful
- slow
- hypercautious
- calculating
- shrewd
- cagey
- thoughtful
- canny
- cautious
- careful
- foresighted
- wary
- watchful
- provident
- vigilant
- cagy
- foresightful
- circumspect
- regardful
- awake
- conservative
- advertent
- attentive
- guarded
- observant
- considerate
- heedful
- chary
- gingerly
- alert
- safe
Antonyms & Near Antonyms
- reckless
- unsafe
- careless
- unmindful
- regardless
- bold
- unwary
- impetuous
- thoughtless
- rash
- negligent
- inattentive
- heedless
- unguarded
- lax
- incautious
- imprudent
- inconsiderate
- venturesome
- neglectful
- brash
- asleep
- unintentional
- forgetful
- injudicious
- inadvertent
- indiscreet
- remiss
- unplanned
- absentminded