to read / to study (a subject) / to attend (a school) / to read aloud / to give (sb) a tongue-lashing (CL:頓|顿[dun4]) / to miss (sb) / idea / remembrance / twenty (banker's anti-fraud numeral corresponding to 廿[nian4])
Mnemonic symbol: this character looks like a big "i" (like in information), and I'll represent it by an advertising column. Maud Younger (y) gives a speech (讠) standing on top of an advertising column (讠) in the anthill's kitchen (an2).