crease

• n. 折り目をつける
• vi. しわを寄せる
• vt. しわを寄せる；折り目をつける

crestのスペル変化から。

crease

crease: [15] Crease and crest are ultimately the same word. The ridges produced by creasing cloth were regarded as similar to ridges or crests, and so the word crease (often creast in late Middle English) came to be applied to them. The loss of the final -t may have been due to the mistaken analysis of creast or crest as the past form of a verb.
=> crest

crease (n.)

1660s, altered from creaste "a ridge," perhaps a variant of crest (n.), via meaning "a fold in a length of cloth" (mid-15c.) which produced a crest. In sports, first in cricket (1779), where it was originally cut into the ground. As a verb, from 1580s. Related: Creased; creasing.

1. Most outfits crease a bit when you are travelling.

旅行中はほとんどの服装が少しシワになっています。

2.Haynes was still at the crease ，unbeaten on 84.

ハインズはまだ打線にいて、彼はすでに84点を取った。

3.Does artificial silk crease more easily than natural silk？

レーヨンは天然糸よりもシワになりやすいのか。

4.Liz sat down on the bed，lowering herself carefully so as not to crease her skirt.

リズは慎重にベッドに座り、スカートがしわになるのを恐れていた。

5.I do make him laugh.Don 't ask me why，but I 'll be saying something and he 'll just crease up.

私は確かに彼を笑わせることができます。なぜかと聞かないでください。でも、私が言いたいことは彼を笑わせるに違いありません。