#n4adj

美しい（うつくしい ; utsukushii) - beautiful

ex. 私には美しい娘がいます。(watashi ni ha utsukushii musume ga imasu) - I have a beautiful daughter.

ex. こんな美しい虹を見たことがありません。(konna utsukushii niji wo mita koto ga arimasen) - I've never seen such a beautiful rainbow as this one.

丁寧（ていねい ; teinei) - polite, conscientious

丁寧語（teineigo) - polite language

ex. 彼女は私を見ると、丁寧にお辞儀をした。(kanojyo wa watashi wo miru to, teinei ni ojigi wo shita) - When she saw me she bowed politely.

ex. 彼に丁寧な返事を書きなさい。(kare ni teinei na henji wo kakinasai) - Please write him a polite response. 

適当（てきとう ; tekitou) - suitable, proper, fitting, appropriate

な-adjective

ex. 適当な言葉を使って、次の会話を完成させなさい。(tekitouna kotoba wo tsukatte, tsugi no kaiwa wo kansei sasenasai) - Using the appropriate word, please complete the following dialogue.

ex. その仕事は若い女性には適当じゃないんですよ。(sono shigoto wa wakai jyosei niwa tekitou jyanain desu yo) - That job is not suitable for young women.

ex. 適当なときに彼にそれを言うつもりです。(tekitouna toki ni kare ni sore wo iu tsumori desu) - I plan to say that to him at the right moment.

変（へん ; hen) - strange, unusual, something wrong 

な-adj

negative meaning vs. おかしい (both pos/neg)

ex. そのオレンジは味が変だった。(sono orenji wa aji ga hen datta) - The taste of that orange was strange.

おかしい (okashii) - strange, weird, unusual, funny

can have both a negative and positive meaning - negative being crazy and weird like someone naked on the street, positive being funny and entertaining like a comedian

ex. 彼はそんな事言うなんておかしい。(kare wa sonna koto iu nante okashii) - It’s weird for him to say something like that.

ex. 私の車はどこかおかしい。(watashi no kuruma wa dokoka okashii) - There’s something weird about my car. (something wrong with)