a- + rise

source: You Are (Not) Known

verb (past arose |əˈrōz| ; past participle arisen |əˈrizən| ) no object

1. (of a problem, opportunity, or situation) emerge; become apparent:

〈問題･危機･機会などが〉生じる, 発生する(occur)

e.g. new difficulties had arisen.

come into being; originate:

〈状況などが〉 «…から» 発生する

e.g. the practice arose in the nineteenth century.

(arise from/arise out of) occur as a result of:

«…に» 起因する «from, out of»

e.g. most conflicts arise from ignorance or uncertainty.

2. formal or literary get up or stand up:

｟やや古/文｠ 起床する; 【座って, 跪いている姿勢から】 «座って, 跪いている姿勢から» （ひざまず）立ち上がる «against» .

e.g. he arose at 9:30 and went out for a walk.

Old English ārīsan, from ā-‘away’ (as an intensifier) + the verb rise.