Verbseoul.
하다 verb (adj)
고독하다godokhadato be lonely or isolated

To say to be lonely or isolated politely in the present tense, use 고독해요 (goh-doh-kae-yoh). Below is the full conjugation of 고독하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
고독해
goh-doh-kae
고독해요
goh-doh-kae-yoh
고독합니다
goh-doh-kahm-nee-dah
Past
고독했어
goh-doh-kae-ssuh
고독했어요
goh-doh-kae-ssuh-yoh
고독했습니다
goh-doh-kae-sseum-nee-dah
Future
고독할 거야
goh-doh-kahl- -guh-yah
고독할 거예요
goh-doh-kahl- -guh-yae-yoh
고독할 겁니다
goh-doh-kahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
고독하세요
goh-doh-kah-sae-yoh
Suggestion / Let's Polite (요)
고독해요
goh-doh-kae-yoh
Question Polite (요)
고독해요?
goh-doh-kae-yoh-?
Connective “and” — (고)
고독하고
goh-doh-kah-goh
Conditional “if” — (면)
고독하면
goh-doh-kah-myuhn
Noun form — (기)
고독함
goh-doh-kahm