単に

N4 最初は簡単に感じても後で難しくなることもあるから注意してね Saisho wa kantan ni kanjite mo ato de muzukashiku naru koto mo aru kara chuui shite ne Even if it seems easy at first it may become difficult later so be careful

N1 単一 tanitsu single, simple, sole N1 単調 tanchou monotony, monotone, dullness N1 単独 tandoku sole, single N2 単数 tansuu singular (number) N3 単位 tan i unit, academic credit, measure N3 単語 tango word, vocabulary item N3 単純 tanjun simple, naive, straightforward N3 単なる tannaru mere, simple, nothing but N4 簡単 kantan simple, easy, brief

N3 単 tan / hitoe simple, one, single