sedulity

perseverance; continuance (inaction); permanence (absence of change); firmness (stability)., constancy, steadiness; singleness of purpose, tenacity of purpose; persistence, plodding, patience; sedulity (industry); pertinacy, pertinacity, pertinaciousness; iteration, bottom, game, pluck, stamina, backbone, grit; indefatigability, indefatigableness; bulldog courage.

persevere, persist; hold on, hold out; die in the last ditch, be in at the death; stick to, cling to, adhere to; stick to one's text, keep on; keep to one's course, keep to one's ground, maintain one's course, maintain one's ground; go all lengths, go through fire and water; bear up, keep up, hold up; plod; stick to work (work); continue; follow up; die in harness, die at one's post.

persevering, constant; steady, steadfast; undeviating, unwavering, unfaltering, unswerving, unflinching, unsleeping, unflagging, undrooping; steady as time; unintermitting, unremitting; plodding; industrious; strenuous; pertinacious; persisting, persistent., solid, sturdy, staunch, stanch, true to oneself; unchangeable; unconquerable (strong); indomitable, game to the last, indefatigable, untiring, unwearied, never tiring.

through evil report and good report, through thick and thin, through fire and water; per fas et nefas; without fail, sink or swim, at any price, vogue la galere.