" nerveless "

1: lacking strength of will or character;

  * e.g., " ... he's a nerveless pushover who'll be eaten alive by his own staff "

•  Synonyms : 

•  characterless,

•  effete,

•  frail,

•  invertebrate,

•  limp-wristed,

•  milk-and-water,

•  namby-pamby,

•  soft,

•  spineless,

•  weak,

•  weak-kneed,

•  weakened,

•  weakling,

•  wet,

•  wimpish,

•  wimpy,

•  wishy-washy

•  Antonyms : 

•  backboned,

•  firm,

•  hard,

•  strong,

•  tough

2: not easily panicked or upset;

  * e.g., " ... to be a paramedic, you need to be calm, clearheaded, and nerveless in emergencies "

•  Synonyms : 

•  imperturbable,

•  unflappable,

•  unshakable

•  Antonyms : 

•  perturbable,

•  shakable