另外
lìngwài · HSK 3
in addition
➕ 另 = another/other + 外 = outside; 'another outside [thing]' = in addition
另 means 'another' or 'separate', and 外 means 'outside' or 'beyond'. Together: something extra beyond what was already mentioned — in addition, besides, moreover.
另 — 口 (mouth) on top of 力 (strength)
另 originally meant 'to separate' or 'divide'. The character is thought to derive from a variant of 别, with 口 (mouth) suggesting speaking or naming apart, and 力 (strength) indicating the action. Today it primarily means 'other' or 'another'.
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'.