屠龙之技tú lóng zhī jì

the art of butchering dragons—unpractical skill of great attainments; an art of a high order but of little value
❍ 及至学成～，不但无所用，且无可语者。(黄宗羲《叙陈言扬勾股述》) As he finished learning the refined art,he found that it was not only useless but there was nobody that he could talk to about it.

• will
• will
• will
• willies
• willing
• will-o'-the-wisp
• willow
• willy-nilly
• wilt
• wilt
• Wilton
• wily
• wimple
• win
• wince
• winceyette
• winch
• wind
• wind
• wind
• windlass
• window
• windy
• wine
• wing