distend
verb [intransitive, transitive] (formal or- distend (something)
to swell (= become larger and rounder than before) or make something swell because of pressure from inside (使)膨胀,肿胀 He tied a piece of cloth around his upper arm to impede circulation and distend the veins. 他在上臂绑了一块布,以阻止血液循环和扩张静脉。
Word Originlate Middle English: from Latin distendere, from dis- ‘apart’ + tendere ‘to stretch’.