Vocabulary consisting only from characters you are able to read

kanji kana meaning randomReload
引く ひく minus, -jlpt3, math
数理 すうり mathematicsmath
山林 さんりん mountain forestleda1, shizen
買う かう to buygodan, jlpt5, verb, vtrans
下る くだる (1)to descend, to go down, to come down, (2)to be handed down (of an order, judgment, etc.), (3)to pass (of time), (4)to surrender, to capitulate, (5)(often in neg. form) to be less than, to be i godan, jlpt3, verb, vintrans