Verbseoul.
descriptive
검질기다geomjilgidapersistent, persevering, pertinacious

To say persistent, persevering, pertinacious politely in the present tense, use 검질겨요 (guhm-cheel-gyuh-yoh). Below is the full conjugation of 검질기다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
검질겨
guhm-cheel-gyuh
검질겨요
guhm-cheel-gyuh-yoh
검질깁니다
guhm-cheel-geem-nee-dah
Past
검질겼어
guhm-cheel-gyuh-ssuh
검질겼어요
guhm-cheel-gyuh-ssuh-yoh
검질겼습니다
guhm-cheel-gyuh-sseum-nee-dah
Future
검질길 거야
guhm-cheel-geel- -guh-yah
검질길 거예요
guhm-cheel-geel- -guh-yae-yoh
검질길 겁니다
guhm-cheel-geel- -guhm-nee-dah

Other useful forms

Command Polite (세요)
검질기세요
guhm-cheel-gee-sae-yoh
Suggestion / Let's Polite (요)
검질겨요
guhm-cheel-gyuh-yoh
Question Polite (요)
검질겨요?
guhm-cheel-gyuh-yoh-?
Connective “and” — (고)
검질기고
guhm-cheel-gee-goh
Conditional “if” — (면)
검질기면
guhm-cheel-gee-myuhn
Noun form — (기)
검질김
guhm-cheel-geem