keep one shoulder the wheel (verb) keep one's nose to the grindstone: work doggedly
Sinonime: chicken*, cowardly, dastardly,
fearful, gutless, lily-livered, mean-spirited, poltroonish, pusillanimous, scared, timorous, weak-kneed, wimpish, wimpy, wussy, yellow*, yellow-bellied
Antonime: bold, brave, courageous,
heroic,
strong