unflappable

About 0.09 uses per million words.

Meaning

1. adjective Remaining composed and level-headed at all times; impossible to fluster; not becoming frustrated or irritated easily. .mw-parser-output .defdate{font-size:smaller}

Similar words

composed imperturbable calm unflutterable unflustered unflusterable unfussable unfazed unflinching unruffled

Often followed by

and in as demeanor calm manner self man nature

Word family

unflappabilities unflappability unflappably