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

下限[kagen] lower limit
俄分限[niwakabungen] mushroom millionaire
期限[kigen] term
給水制限[kyuusuiseigen] water supply restrictions
局限[kyokugen] limit

極限[kyokugen] utmost limits
勤務年限[kinmunengen] term of service
軍備制限[gunbiseigen] limitation of armaments
権限[kengen] power
限り[kagiri] limit