remain
re- (expressing intensive force) + manere ‘to stay’
https://gyazo.com/e7631a33449f9cbf82a47a831757a025
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verb no object
continue to exist, especially after other similar or related people or things have ceased to exist:
〈物･事が〉 «…に» 残っている(｟よりくだけて｠ be left) «of»
e.g. a cloister is all that remains of the monastery.
stay in the place that one has been occupying:
〖remain＋副詞〗 〈人･物･事が〉…にとどまる, 居残る (!(1)〖副詞〗は場所･状態の表現. (2)stayよりややかたく, ｟書｠ で好まれる)
e.g. her husband remained at the beach condo.
with complement continue to possess a particular quality or fulfill a particular role:
〖remain C〗 〈人･物･事が〉C〈状態〉のままである, 相変わらずCだ (!Cは〖名詞〗〖形容詞〗〖分詞〗など)
e.g. he had remained alert the whole time.
be left over after others or other parts have been completed, used, or dealt with:
〖～ to be done〗 〈事が〉これから…されなければならない, まだ…されないままだ
e.g. several years remain in the transition period.
PHRASES
remain to be seen
used to express the notion that something is not yet known or certain:
e.g. she has broken her leg, but it remains to be seen how badly.
ORIGIN
late Middle English: from Old French remain-, stressed stem of remanoir, from Latin remanere, from re- (expressing intensive force) + manere ‘to stay’.