军事科学

• ⼅(hook; fishhook)RADICAL
• 口(mouth; speech)ASSOCIATIVE
• 彐(hand holding brush)ASSOCIATIVE

Using your hand to hold a brush and write down important spoken words from beginning to end is work.

• 禾(rice plant)RADICAL
• 斗(threshing floor; rice threshing area)ASSOCIATIVE

To classify rice grain by measuring each type with a measuring vessel.

• ⺍(two hands (indicating learning))ASSOCIATIVE
• 冖(roof; house)ASSOCIATIVE
• 子(child)RADICAL

A child sitting under a roof with two hands diligently studying represents learning.