無的英語翻譯：

naught; nonexistence; not; nothing; without; lack; zero
【醫(yī)】 a-; leipo-; lipo-; non-

痛的英語翻譯：

ache; extremely; pain; painfulness; sorrow
【醫(yī)】 alge-; algesi-; algo-; algos; dolor; odyno-; pain

潰瘍的英語翻譯：

abscess; canker; sore; ulcer; ulceration
【醫(yī)】 anabrosis; cancrum; canker; exelcosis; helco-; sore; ulcer; ulcera
ulceration; ulcus