Vocabulary consisting only from characters you are able to read
助ける
たすける
to help/to save/to rescue/to give relief to/to spare (life)/to reinforce/to promote/to abet/(P)ichidan, jlpt3, verb, vtrans
過去
かこ
(1)the past, bygone days, the previous, (2)a past (i.e. a personal history one would prefer remained secret), one's past, (3)(ling) past (tense), preterit, preterite, (4)(Buddh) previous life toki
同窓会
どうそうかい
graduate's association, alumni meeting, class reunion
山川
さんせん; やまかわ; やまがわ
mountains and rivers; mountains and rivers; mountain riversmix
浅薄な
せんぱくな
povrchní, chatrnýmix
最大値
さいだいち
global maximum, greatest valuemath