undrooping
61persistent — adj 1. persevering, assiduous, tenacious; diligent, zealous, ambitious, industrious, sedulous, careful, attentive, painstaking, plodding; indefatigable, indomitable, untiring, unwearied, undrooping, unflagging, never sleeping, never wearying,… …
62pertinacious — adj 1. stubborn, Inf. ornery, pigheaded, mulish, stubborn as a mule; unyielding, intractable, obdurate, obstinate; inflexible, unbending, adamant, adamantine, rigid, stony, fixed, stiff, stiff necked; unswerving, undeviating, uncompromising,… …
63sedulous — adj 1. assiduous, constant, unremitting, continuous, continual, uninterrupted, ongoing, Inf. without letup; untiring, tireless, indefatigable, inexhaustible, unfailing, unflagging, undrooping, unfaltering; patient, plodding, determined, resolved …
