此外
cǐwài · HSK 4
in addition
➕ 此 = this + 外 = outside → 'outside of this' = besides, in addition
此 means 'this' and 外 means 'outside/beyond'. Together 此外 literally reads 'outside of this' — i.e. beyond what was just said, hence 'besides' or 'moreover'. Common written connector.
此 — foot 止 + spoon/person 匕
此 originally depicted a person (匕) standing with a foot (止), suggesting 'to stop here' or 'this place.' Over time the meaning generalized from a specific location to the demonstrative pronoun 'this.' The foot component still hints at the original sense of standing in a particular spot.
外 — evening 夕 + divination 卜
Originally a compound of 夕 (evening) and 卜 (divination). Ancient Chinese divinations were performed in the morning; doing them at evening (夕) was considered irregular or 'outside' the norm. From this sense of deviation, 外 came to mean 'outside' or 'external'.