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The Japanese word

1年生

is pronounced
ichinensei | いちねんせい
means
1st year student
Examples:
うちの高校の寮は、1年生は2人部屋で、2年生から1人部屋になるんだ。
uchi no kōkō no ryō wa, 1 nensei wa 2 nin heya de, 2 nensei kara 1 nin heya ni narun da.
In my high-school's dormitory, the first years share a room with another student, but starting from the second year, students have individual rooms.
Examples sourced from tatoeba.org