THESAURUS
unblinking
agile, alert, alive, attentive, awake, bright, calm, coolheaded, inexcitable, keen, nerveless, nimble, on the, on the alert, on the ball, on the job, prompt, qui vive, quick, ready, relaxed, rock-steady, sharp, sleepless, smart, steady, steady-handed, steady-nerved, steel-nerved, strong-nerved, unabashed, unappalled, unawed, unblenching, uncowed, uncringing, undaunted, undismayed, unfaltering, unflinching, unintimidated, unnervous, unnodding, unquivering, unshaken, unshaky, unshrinking, unsleeping, unstrained, untremulous, unwavering, unwinking, wakeful, wide-awake, without a tremor