A solar year, the time it takes the Earth to complete one revolution of the Sun (between 365.24 and 365.26 days depending on the point of reference)

(a duration of) one year / an unspecified year in the past

(idiomatic) to age, to get older

three years; the third year / (education) the third school year / (figuratively) a long period of time, several years

three years; triennial / three years old

thin, fine / slender

独活の大木: good-for-nothing

graduation examination

practical test

combined / joint / united