Keyword
inside
Info
FrequencyTop 100-200
Type
Kyōiku (2nd grade) 
?
KankenLevel 9
Heisig1095
Readings
ない
(80%)
うち
(15%)
だい
(2%)
(1%)
Composed of
upside-down box
person
Mnemonic

A pictograph of a person inside of an upside-down box with only his head sticking out.

Used in kanji (8 in total)
meat
illness
to supply
pattern
third in class
narrowness
archer's left-wrist protector
???
Used in vocabulary (993 in total)
inside; within
contents; content; substance; matter; detail; import
guidance; leading (the way); information; notice; announcement (of one's arrival); invitation
Examples (200 in total)
You must not cast a spell upon someone inside the school.
There is no substance in his speech.
The contents of the letter were secret.