insouciant

There was no secernment between her soul and surface; she was mere, insouciant, with a rare dulcedo.

I rattled on, insouciant and careless to all appearances, but in reality my heart like lead.

In spite of his own imperturbability, on which he set some store, the insouciant aspect of his surroundings jarred on him.

Here, under this Southern sun, we of the North are in danger of acquiring a sort of insouciant directness almost primitive.

I watched her, on the opposite footpath, strolling down the shady avenue with an insouciant grace.