after; behind; (at the beginning of a sentence) afterwards; since then
之 (zhī) · 3 strokes
Pictograph of a foot (止) going out of an area. The current meaning is a phonetic loan.
后 (Hòu) · 6 strokes
Depicts a queen mother (母) giving birth to her heir (𠫓). Based on the original meaning "heir to the throne". The meaning later expanded to "ruler", "successor", and "after".