only if (..., or otherwise, ...); only when; only in the case that; un
除 (chú) · 9 strokes
Phonosemantic compound. 阝 represents the meaning and 余 represents the sound. Based on the original meaning "stair steps". The meaning later shifted to "divide", "remove", and "except".
非 (Fēi) · 8 strokes
Depicts two people facing opposite directions.