without warning
ADJECTIVE
precipitous/precipitate
Synonyms
WEAK
abrupt
breakneck
brief
frantic
gone off half-cocked
harum-scarum
hasty
headlong
heedless
hurried
ill-advised
impatient
impetuous
indiscreet
jump the gun
madcap
off the hip
off the top of head
plunging
precipitant
quick
rapid
rash
reckless
refractory
rushing
subitaneous
swift
unanticipated
uncontrolled
unexpected
unforeseen
violent
willful
Antonyms
ADJECTIVE
surprising
Synonyms
Antonyms
STRONGEST
ADJECTIVE
unheralded
Synonyms
Antonyms
ADVERB
short
Synonyms
ADVERB
suddenly
Synonyms
STRONGEST
STRONG
WEAK
Antonyms
WEAK
ADVERB
swiftly
Synonyms
Antonyms
ADVERB
swiftly/swift
Synonyms
Antonyms
WEAK
From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.