Verbseoul.
ㄹ stem (adj)
낯설다natseoldastrange

To say strange politely in the present tense, use 낯설어요 (naht-suh-ruh-yoh). Below is the full conjugation of 낯설다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
낯설어
naht-suh-ruh
낯설어요
naht-suh-ruh-yoh
낯섭니다
naht-suhm-nee-dah
Past
낯설었어
naht-suh-ruh-ssuh
낯설었어요
naht-suh-ruh-ssuh-yoh
낯설었습니다
naht-suh-ruh-sseum-nee-dah
Future
낯설 거야
naht-suhl- -guh-yah
낯설 거예요
naht-suhl- -guh-yae-yoh
낯설 겁니다
naht-suhl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
낯서세요
naht-suh-sae-yoh
Suggestion / Let's Polite (요)
낯설어요
naht-suh-ruh-yoh
Question Polite (요)
낯설어요?
naht-suh-ruh-yoh-?
Connective “and” — (고)
낯설고
naht-suhl-goh
Conditional “if” — (면)
낯설면
naht-suhl-myuhn
Noun form — (기)
낯섦
naht-suhm