unflappable

Your father was so sharp minded, so unflappable.

Brioche, though, struck the balance: rich, tender and unflappable.

Acquaintances describe Martin’s demeanor as extraordinarily genial; he smiled constantly and offered his diagnoses in a straightforward, unflappable drawl.

Jones seems pretty unflappable, and those windows where he is throwing it 15-20 yards, he is putting it on these guys.

However, such was Rodrigues' brilliance - her speed between the wickets, her innovation by shuffling across her stumps, her pinpoint ability to pick the gaps between fielders - that the usually unflappable Australia were rocked.