late 14c., envolupen, "be involved" (in sin, crime, etc.), from Old French envoleper "envelop, cover; fold up, wrap up" (10c., Modern French envelopper), from en- "in" (see en- (1)) + voloper "wrap up," which is of uncertain origin, perhaps Celtic (see Gamillscheg, Diez) or Germanic ("Century Dictionary"). Literal sense is from 1580s. Related: Enveloped; enveloping.
例文
1. Thomas crumpled the empty envelop and tossed it accurately into the wastebasket.
トーマスは空封筒を丸め、紙くずかごに正確に捨てた。dd>
2.They pushed the envelop of pop music and became the biggest band of the 20 th century.
彼らはポップス界を革新し続け、20世紀で最も偉大な楽団となった。
3.Which include envelop generator，low-freq oscillator， envelop control，manual control，etc.
これらの手段はエンベロープ発生器、低周波発振器、エンベロープ制御、手動制御などである。
4.The papers are falling out of the envelop ，push them back.
論文が袋から落ちてきたので、元の場所に戻します。
5.All combine to form a layer of mist to envelop this region.