Vocabulary consisting only from characters you are able to read

kanji kana meaning randomReload
四十 よんじゅう 40math
山上 さんじょう mountain topmix
人口 じんこう populationjlpt4, leda1
かい (1)(uk) Japanese babylon (species of shelled mollusk, Babylonia japonica), Japanese ivory shell, (2)(abbr) spinning top (traditionally made from a Japanese babylon shell)
~円 ~えん yenjlpt5
足音 あしおと kroky, zvuk krokůleda1
見下ろす みおろす to overlook; to command a view of; to look down on
円い まるい round, circular, sphericaladj, jlpt5
~中 ~ちゅう in (the middle of), within, during, whilejlpt5
やる気 やるき willingness (e.g. to do something)/eagerness/motivation/inspiration/determination/high aspirationsjlpt3
赤えい あかえい stingraydoubutsu
エー足す1エコールビー エーたす1エコールビー A+1=Bmath
上手 じょうず skill, skillful, dexterityadj, jlpt5, leda1
つち groundshizen
きゅう ninejlpt5, mix