コマ割り[komawari] panel layout
一割[ichiwari] ten percent
一割引き[ichiwaribiki] 10% off sale
学割り[gakuwari] student discount
額面割れ[gakumenware] drop below par

割く[saku] to tear
割引券[waribikiken] discount coupon or ticket
割引く[waribiku] to discount
割り栗[wariguri] rubble
割り栗石[wariguriishi] crushed rock

いい年をして[iitoshiwoshite] (in spite of) being old enough to know better
亥年[idoshi] year of the boar
一箇年[ikkanen] one year
一周年[isshuunen] one full year
一年以内に[ichineninaini] within a year

一年間[ichinenkan] (period of) one year
一年生[ichinensei] annual (plant)
一年草[ichinensou] annual (plant)
一年ぢゅう[ichinenjuu] all year round
一両年[ichiryounen] (a) year or two