path
n.
Old English paþ, pæþ "path, track," from West Germanic *patha- (cognates: Old Frisian path, Middle Dutch pat, Dutch pad, Old High German pfad, German Pfad "path"), of uncertain origin. The original initial -p- in a Germanic word is an etymological puzzle. Don Ringe ("From Proto-Indo-European to Proto-Germanic," Oxford 2006) describes it as "An obvious loan from Iranian ..., clearly borrowed after Grimmâs Law had run its course." Watkins says the word is "probably borrowed (? via Scythian) from Iranian *path-," from PIE root *pent- "to tread, go, pass" (source of Avestan patha "way;" see find, v.), but this is too much of a stretch for OED and others. In Scotland and Northern England, commonly a steep ascent of a hill or in a road.
☞ pat, pass, path
☞ path, pathy
☞ path, pathy
词根：path = feeling, suffering, illness, 表示“感情, 痛苦, 病”
pathos n. 悲哀（path痛苦+os表名词）
pathetic a. 可怜的；动情的（path+exit→动感情的）
antipathy n. 反感（anti反+pathy→反感情）
apathy n. 冷淡，漠不关心（a 无+pathy→无感情）
apathetic a. 冷漠的（a+path+etic)
sympathy n. 同情，怜悯（sym共同+pathy→共同感情→同情）
pathology n. 病理学（path+o+logy学科→病的学科→病理学）
psychopath n. 精神病人（psycho精神+path→精神病人）
electropathy n. 电疗法（electro电+pathy→用电治病→电疗）