getting in one hair (verb) pester: bother, harass
Sinonime: active,
assiduous, bound and determined, dead set on,
determined,
diligent, dogged,
energetic, hell-bent,
industrious, inexhaustible, ironclad, nose to grindstone,
painstaking,
patient,
persevering,
persistent,
pertinacious,
relentless,
sedulous,
steadfast, stop at nothing,
strenuous,
tireless, unfaltering, unflagging, unflinching, unremitting, unwavering, unwearied, unwearying,
vigorousAntonime: fatigued,
tired,
weary