Unabashed means not embarrassed in the slightest. Unabashed enthusiasm, entirely unabashed, unabashed by the criticism.
It is usually admiring — unabashed enthusiasm is a compliment, because the person is enjoying something they might have been expected to be shy about. The abash in it is an old verb meaning to disconcert, which now survives only in this negative.
1adjectiveunabashedNot embarrassed in the slightest.
“He was unabashed by the criticism and carried on singing loudly.”
unabashed is a quality of confidence.
From un- + abashed.
Etymology from Wiktionary, CC BY-SA