形容詞 indecent:

1. not in keeping with accepted standards of what is right or proper in polite society
   同義詞：indecorous, unbecoming, uncomely, unseemly, untoward
2. offensive to good taste especially in sexual matters
3. offending against sexual mores in conduct or appearance

1. Something, such as a word, an act, or an expression, that is indecent or lewd.
   猥褻的話不正經(jīng)或淫猥的事物，如話語、行動或表情
2. It is indecent to say that.
   說那樣的話是很不禮貌的。
3. A crudely indecent word or phrase; an obscenity.
   下流話粗俗下流的詞或短語; 下流話

in.de.cent

adj.（形容詞）
Offensive to good taste; unseemly.
沒品味的; 不適當(dāng)?shù)模号c好的品味相悖的；不合禮節(jié)的
Offensive to public moral values; immodest.See Synonyms at improper
無禮的; 猥褻的：冒犯公共道德價值觀的；下流的參見 improper

【引伸】
inde.cently
adv.（副詞）