unflappable

Etymology
From.

Adjective

 * 1) Remaining composed and level-headed at all times; impossible to fluster; not becoming frustrated or irritated easily.

Translations

 * Bulgarian:
 * Catalan: impertorbable
 * Dutch:
 * Finnish: järkähtämätön
 * French:
 * German:
 * Hungarian: kizökkenthetetlen,, , , ,
 * Macedonian: нево́збуден
 * Polish:
 * Russian:
 * Spanish: