Verbseoul.
하다 verb (adj)
지긋하다jigeuthadaadvanced in years

To say advanced in years politely in the present tense, use 지긋해요 (chee-geu-tae-yoh). Below is the full conjugation of 지긋하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
지긋해
chee-geu-tae
지긋해요
chee-geu-tae-yoh
지긋합니다
chee-geu-tahm-nee-dah
Past
지긋했어
chee-geu-tae-ssuh
지긋했어요
chee-geu-tae-ssuh-yoh
지긋했습니다
chee-geu-tae-sseum-nee-dah
Future
지긋할 거야
chee-geu-tahl- -guh-yah
지긋할 거예요
chee-geu-tahl- -guh-yae-yoh
지긋할 겁니다
chee-geu-tahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
지긋하세요
chee-geu-tah-sae-yoh
Suggestion / Let's Polite (요)
지긋해요
chee-geu-tae-yoh
Question Polite (요)
지긋해요?
chee-geu-tae-yoh-?
Connective “and” — (고)
지긋하고
chee-geu-tah-goh
Conditional “if” — (면)
지긋하면
chee-geu-tah-myuhn
Noun form — (기)
지긋함
chee-geu-tahm