Vocabulary consisting only from characters you are able to read

kanji kana meaning randomReload
足す tasu addjlpt3, jlpt4, math
エー足すビー足すシー e-tasubi-tasuši- A+B+Cmath
otouto younger brotherjlpt5, kazoku, leda1
ni (num) twojlpt5
~年 ~nen makes preceding number a yearjlpt5, toki