c. 1400, "affecting the sinews," from Latin nervosus "sinewy, vigorous," from nervus "sinew, nerve" (see nerve). Meaning "of or belonging to the nerves" in the modern sense is from 1660s. Meaning "suffering disorder of the nervous system" is from 1734; illogical sense "restless, agitated, lacking nerve" is 1740. Widespread popular use as a euphemism for mental forced the medical community to coin neurological to replace it in the older sense. Nervous wreck first attested 1862. Related: Nervously; nervousness.
例文
1. I get very nervous because I 'm using a lot of expensive equipment.
高価なデバイスをたくさん使用しているので、とても緊張しています。
2.He developed a nervous twitch and began to blink constantly.
彼の体は神経性痙攣を起こし、しきりに瞬きを始めた。
3.She felt nervous ，increasingly lacking in confidence about herself.
彼女は緊張して、自分に自信がなくなってきた。
4.This works through the mediation of the central nervous system.
これは中枢神経系の調節作用によって実現される。
5.She 's nervous about something,in case you didn 't notice.彼女は何のために神経を尖らせているのか、あなたはそれさえ見ていませんか。