History
History
Synonyms
UK
US
Meaning:
imperturbable

not easy troubled or excited

calm, collected

impotent

not having enough strength, influence etc (to do something or prevent, act, change etc something); (of a man) incapable of sexual intercourse

disabled; unable to perform action

intrepid

brave and fearless

brave, nervy

NERVELESS as in Wiktionary
NERVELESS as in Wikipedia