Vocabulary consisting only from characters you are able to read
次々に
つぎつぎに
one by one, one after another, successivelyjlpt3
泳法
えいほう
swimming stylemix
必要(な)
ひつよう(な)
(1)necessary/needed/essential/indispensable/(n) (2)necessity/need/requirement/(P) adj, leda1
登録
とうろく
registration/accession/register/entry/record/(P)suru
加熱
かねつ
heating, application of heatsuru
幸い
さいわい
happiness, blessednessmix
係数
けいすう
(math) coefficient, factor, proportional constantmix
相続
そうぞく
succession, inheritancesuru