The antonym of the word "Hideous" is -

• Hideous (Adjective).
- English meaning: Very ugly or unpleasant.
- Bangla meaning: অতি কুৎসিত; কদাকার; বীভৎস; ভয়ানক।

• Synonym: Ugly, Disgusting, Horrible, Sickening.
• Antonym: Innocuous, Acceptable, Attractive, Desirable.

• উল্লিখিত অপশনগুলো,
- Awful - ভয়ানক, ভীষণ, ভয়াবহ, ভয়ঙ্কর;
- Imperil - বিপদাপন্ন/ বিপদগ্রস্ত করা;
- Joke - রসিকতা, মজা;
- Pleasant - মনোরম; মনোজ্ঞ।

• Example sentence:
- The monster in the movie looked absolutely hideous.
- She wore a hideous dress that didn’t match the occasion.

Source: Merriam & Webster Dictionary, Oxford Dictionary, Accessible Dictionary.