in-explainable (adjective) inexplicable: beyond comprehension, explanation
Sinonime: airy, at ease, blithe, breezy,
buoyant,
calm,
careless, cheerful, cheery, cool, easy, easy-going, feelgood,
happy, happy-go-lucky, insouciant,
jaunty,
jovial, laid back,
radiant,
secure,
sunny, unanxious, unbothered
Antonime: anxious, heavyhearted, troubled, worried