词根词缀：acuto-, acut-, acuti-, acu-, -cusis; also, agu-

【来源及含义】Latin: sharp, to sharpen, point; needle, pin

【相关词根词缀】 Cross references of word families that are related directly, or indirectly, to: "sour, sharp": acerb-; aceto-; acid-; acies- (not "sour"); oxy-; pung- (not "sour").

【同源单词】acicula, acicular, acicular ice, aciculate, aciculate, aciculiform

词根词缀：pung-, punc-, punct-

【来源及含义】Latin: pungere, punctum to strike, to hit, to punch, to pierce, to puncture, to point, to sting, to bite; a dot, a mark; a point, a sharp point, a pinpoint

【相关词根词缀】 Cross references of word families that are related directly, or indirectly, to: "sour, sharp": acerb-; aceto-; acid-; acies- (not "sour"); acuto- (not "sour"); oxy-.

【同源单词】acupoint, acupunctuate, acupunctuation, acupuncturation, acupuncture, acupuncture