Verbseoul.
하다 verb (adj)
엄격하다eomgyeokhadastrict, severe, stern, rigid, rigorous

To say strict, severe, stern, rigid, rigorous politely in the present tense, use 엄격해요 (uhm-gyuh-kae-yoh). Below is the full conjugation of 엄격하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
엄격해
uhm-gyuh-kae
엄격해요
uhm-gyuh-kae-yoh
엄격합니다
uhm-gyuh-kahm-nee-dah
Past
엄격했어
uhm-gyuh-kae-ssuh
엄격했어요
uhm-gyuh-kae-ssuh-yoh
엄격했습니다
uhm-gyuh-kae-sseum-nee-dah
Future
엄격할 거야
uhm-gyuh-kahl- -guh-yah
엄격할 거예요
uhm-gyuh-kahl- -guh-yae-yoh
엄격할 겁니다
uhm-gyuh-kahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
엄격하세요
uhm-gyuh-kah-sae-yoh
Suggestion / Let's Polite (요)
엄격해요
uhm-gyuh-kae-yoh
Question Polite (요)
엄격해요?
uhm-gyuh-kae-yoh-?
Connective “and” — (고)
엄격하고
uhm-gyuh-kah-goh
Conditional “if” — (면)
엄격하면
uhm-gyuh-kah-myuhn
Noun form — (기)
엄격함
uhm-gyuh-kahm