鍛 - forge, discipline, train

tempering (metal); annealing; forging

to forge; to temper

metal worker

strike while the iron is hot

forging; tempering

tempering iron; forging steel; wrought iron

forging

blacksmith's workshop; smithy; forge; foundry

self-discipline; self-improvement

to train thoroughly (one's body, muscles, etc.); to practice (a skill) to perfection

gunsmith

to temper thoroughly