Keyword
doubt
Info
FrequencyTop 500-600
Type
Kyōiku (6th grade) 
?
KankenLevel 5
Heisig1513
Readings
(58%)
Composed of
spoon
arrow
halberd blade
small animal (archaic)
Used in kanji (4 in total)
thicken
imitate
???
stupid [old]
Used in vocabulary (98 in total)
to doubt; to distrust; to be suspicious of; to suspect
doubt; question; suspicion; dubiousness
doubt; question; uncertainty; skepticism; scepticism; suspicion
Examples (40 in total)
I doubt it.
He voiced his doubt.
In other words, you should doubt common sense.