entries → 預先
TSUMUGU · B2 · 詞
預先 word · B2
預先 ＝ 預 ＋ 先
ㄩˋ ㄒㄧㄢ · yù xiān
adverb — in advance, beforehand.

字源 FORM — what the parts do

預in advance, beforehand (預備)yù
先first, earlier (先後)xiān
預先，預備的預，先後的先。