鋭 （エイ） sharpness, sharp weapon, blade, fine soldier

鋭意 （エイイ） eagerly, earnestly, zealously, wholeheartedly, diligently, assiduously

精鋭 （セイエイ） elite, best, pick, cream of the crop

気鋭 （キエイ） spirited, energetic

鋭い （するどい） sharp (knife, claws, etc.), pointed, sharp (pain, tone, etc.), acute, stabbing, cutting (remark, criticism, etc.), stinging, biting, fierce (attack), pointed (question, look, etc.), piercing (gaze), shrill (sound), keen (intuition, sense of smell, etc.), acute, sharp (eye, mind, etc.), astute, shrewd, discerning, penetrating (insight, question, etc.), perceptive