Vocabulary consisting only from characters you are able to read
山川
さんせん; やまかわ; やまがわ
mountains and rivers; mountains and rivers; mountain riversmix
母国語
ぼこくご
mother tongue, native languagemix
金山
きんざん
(gold) mine; (gold) minemix
切線
せっせん
tangent (in trigonometry)mix
行間
ぎょうかん
line-spacing in text, between the linesmix
回数
かいすう
number of times, frequency, countmix
2階
2かい
(1)storey/story/floor/(n) (2)stairs/(n,n-suf) (3)stage (in chronostratigraphy)/(ctr) (4)counter for storeys and floors of a building/(P); stairs; (n) stairs mix
中年
ちゅうねん
middle-age, middle age, midlife, one's middle yearsmix