source: Anime Nervous GIF - Anime Nervous Scared - Discover & Share GIFs

VIGOROUS, ENERGETIC, STRENUOUS, LUSTY, NERVOUS mean having or showing great vitality and force.

VIGOROUS further implies showing no signs of depletion or diminishing of freshness or robustness.

e.g. as vigorous as a youth half his age

ENERGETIC suggests a capacity for intense activity.

e.g. an energetic campaigner

STRENUOUS suggests a preference for coping with the arduous or the challenging.

e.g. the strenuous life on an oil rig

LUSTY implies exuberant energy and capacity for enjoyment.

e.g. a lusty appetite for life

NERVOUS suggests especially the forcibleness and sustained effectiveness resulting from mental vigor.

e.g. full of nervous energy

1. easily agitated or alarmed; tending to be anxious; highly strung:

〖通例名詞の前で〗神経質な, 神経過敏な, 臆病な, 心配性の〈人･行動〉

e.g. a sensitive, nervous person

e.g. these quick, nervous birds.

anxious or apprehensive:

〖通例be ～〗 〈人が〉 «…に» 不安で, 心配して; 緊張して, びくびくして «about» , ｟英｠ «of, at, that節» (→ tense)

e.g. staying in the house on her own made her nervous

e.g. I was nervous about my new job.

(of a feeling or reaction) resulting from anxiety or anticipation:

不安からくる〈意識･反応など〉

e.g. nervous energy.

2. relating to or affecting the nerves:

比較なし 〖名詞の前で〗神経の, 神経性の, 神経に作用する

e.g. a nervous disorder.

late Middle English (in the senses ‘containing nerves’ and ‘relating to the nerves’): from Latin nervosus ‘sinewy, vigorous’, from nervus ‘sinew’ (see nerve). nervous (sense 1) dates from the mid 18th century.