rack one's brains
VERB
concentrate
Synonyms
Antonyms
VERB
mull
Synonyms
Antonyms
VERB
puzzle
Synonyms
Antonyms
VERB
ratiocinate
Synonyms
Antonyms
VERB
ruminate
Synonyms
STRONGEST
STRONG
WEAK
Antonyms
VERB
think
Synonyms
Antonyms