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

跨ぐ[matagu] to step over
跨線橋[kosenkyou] overpass
跨る[matagaru] to extend over or into
跨ぎ[matagi] step or stride (over something)

跨道橋[kodoukyou] overpass
跨座式[kozashiki] straddle-beam type
年跨[toshimatagi] continuance into the new year