Vocabulary consisting only from characters you are able to read
老化
rouka
ageing, aging, senile deteriorationsuru
軍隊
guntai
army, troopsmix
位
kurai
(1)place, rank, (2)decimal place, (3)counter for ghosts; (4)throne, crown, (nobleman's) seat, (5)government position, court rank, (6)social standing, rank, class, echelon, rung, (n) (7)grade (o counter
記録
kiroku
(1)record, minutes, document, (2)a record (e.g. in sports), results, score, (vs) (3)to record, to document, (4)to set a record (e.g. in sports), to show a result, to reach a value jlpt3
必ずしも
kanarazušimo
(not) always, (not) necessarily, (not) all, (not) entirelymix
印す
širusu
(1)(arch) to leave (a mark, trace, etc.), to print, to stamp, (2)to show a sign (i.e. an omen) godan, verb, vtrans
助ける
tasukeru
to help/to save/to rescue/to give relief to/to spare (life)/to reinforce/to promote/to abet/(P)ichidan, jlpt3, verb, vtrans