Verbseoul.
regular
사무치다samuchidato pierce (to one's heart), to penetrate, to touch

To say to pierce (to one's heart), to penetrate, to touch politely in the present tense, use 사무쳐요 (sah-moo-chyuh-yoh). Below is the full conjugation of 사무치다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
사무쳐
sah-moo-chyuh
사무쳐요
sah-moo-chyuh-yoh
사무칩니다
sah-moo-cheem-nee-dah
Past
사무쳤어
sah-moo-chyuh-ssuh
사무쳤어요
sah-moo-chyuh-ssuh-yoh
사무쳤습니다
sah-moo-chyuh-sseum-nee-dah
Future
사무칠 거야
sah-moo-cheel- -guh-yah
사무칠 거예요
sah-moo-cheel- -guh-yae-yoh
사무칠 겁니다
sah-moo-cheel- -guhm-nee-dah

Other useful forms

Command Polite (세요)
사무치세요
sah-moo-chee-sae-yoh
Suggestion / Let's Polite (요)
사무쳐요
sah-moo-chyuh-yoh
Question Polite (요)
사무쳐요?
sah-moo-chyuh-yoh-?
Connective “and” — (고)
사무치고
sah-moo-chee-goh
Conditional “if” — (면)
사무치면
sah-moo-chee-myuhn
Noun form — (기)
사무침
sah-moo-cheem