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Webster 1913 Edition

(nẽrv′lĕs)

Adj.

Destitute of nerves.

Destitute of strength or of courage; wanting vigor; weak; powerless.

A kingless people for a

nerveless

state.

Byron.

Awaking, all

nerveless

, from an ugly dream.

Hawthorne.

Adj.

Destitute of strength; weak.

nerveless ‎(comparative more nerveless, superlative most nerveless)

Lacking nerve: fearful; cowardly.
(biology) Lacking a nervous system.
Devoid of nerves: calm, controlled, cool under pressure.
- 2012 June 28, Jamie Jackson, “Wimbledon 2012: Lukas Rosol shocked by miracle win over Rafael Nadal”, in the Guardian:
  There was no distracting Rosol's ice-calm as he killed the fifth set and match. Ace, cross-court forehand winner, ace, forehand winner – a blistering eighth game took him to 5-3 and informed Nadal precisely how nerveless the Czech was.