Meaning

adjective marked by calm self-control (especially in trying circumstances); unemotional

adjective lacking strength; - Nathaniel Hawthorne

originEtymology tree English nerve Proto-Indo-European *lewh₁- Proto-Indo-European *lewHs-der. Proto-Germanic *leusaną Proto-Germanic *lausaz Proto-Germanic *-lausaz Proto-West Germanic *-laus Old English -lēas Middle English -les English -less English nerveless From nerve + -less.

Etymology from Wiktionary, CC BY-SA 3.0