dilate
v.
late 14c., from Old French dilater, from Late Latin dilatare "make wider, enlarge," from dis- "apart" (see dis-) + latus "wide" (see latitude). Related: Dilated; dilating.
〔李〕[di-（di-）=apart 开；lat=to widen 加宽；-e⇒“to widen apart 加宽开来”→] vt. expand；enlarge 膨胀；扩大