弛緩(しかん)

relaxation; slackening

弛(たる)み

sagging; slackness

弛(たる)む

to sag; to slacken

弛(ゆる)める

to loosen; to relax

弛(たゆ)まず

steadily; unremittingly

弛張(しちょう)

alternation of tension and relaxation

弛張熱(しちょうねつ)

remittent fever

弛廃(ちはい)

decline; laxity

治療(ちりょう)には筋肉(きんにく)の弛緩(しかん)が必要(ひつよう)だ。

Muscle relaxation is necessary for the treatment.

彼(かれ)は弛(たゆ)まず研究(けんきゅう)を続(つづ)けた。

He continued his research without slackening his efforts.