Shloka 53

तथैव द्वादशसमा: कपाली ब्रह्महा भवेत्‌ । ब्रह्मचारी भवेन्नित्यं स्वकर्म ख्यापयन्‌ मुनि:

tathaiva dvādaśa-samāḥ kapālī brahmahā bhavet | brahmacārī bhaven nityaṃ svakarma khyāpayan muniḥ ||

Bhīṣma said: “In the same way, for twelve years he should live as a skull-bearing ascetic; he is to be regarded as one who has incurred the sin of brahmin-slaying. He should remain ever a celibate religious student, and, as a sage, openly acknowledge and make known his own deed (and the penance undertaken for it).”

तथाthus
तथा:
TypeIndeclinable
Rootतथा
एवindeed/just
एव:
TypeIndeclinable
Rootएव
द्वादशtwelve
द्वादश:
TypeAdjective
Rootद्वादश
FormGender: (agreeing) Masculine; Case: Nominative; Number: Plural
समाःyears
समाः:
Adhikarana
TypeNoun
Rootसमा
FormGender: Feminine; Case: Nominative; Number: Plural
कपालीa skull-bearer (kapālin)
कपाली:
Karta
TypeNoun
Rootकपाली
FormGender: Masculine; Case: Nominative; Number: Singular
ब्रह्महाslayer of a brāhmaṇa
ब्रह्महा:
Karta
TypeNoun
Rootब्रह्महन्
FormGender: Masculine; Case: Nominative; Number: Singular
भवेत्would be/should become
भवेत्:
TypeVerb
Rootभू
FormTense/Mood: Optative (Vidhi-liṅ); Person: 3rd; Number: Singular
ब्रह्मचारीcelibate student (brahmacārin)
ब्रह्मचारी:
Karta
TypeNoun
Rootब्रह्मचारिन्
FormGender: Masculine; Case: Nominative; Number: Singular
भवेत्would be/should become
भवेत्:
TypeVerb
Rootभू
FormTense/Mood: Optative (Vidhi-liṅ); Person: 3rd; Number: Singular
नित्यम्always
नित्यम्:
TypeIndeclinable
Rootनित्य
स्वकर्मone's own duty/action
स्वकर्म:
Karma
TypeNoun
Rootस्वकर्मन्
FormGender: Neuter; Case: Accusative; Number: Singular
ख्यापयन्proclaiming/making known
ख्यापयन्:
TypeVerb
Rootख्यापयत् (causative of √ख्या)
FormParticiple: Present active (śatṛ); Gender: Masculine; Case: Nominative; Number: Singular
मुनिःsage
मुनिः:
Karta
TypeNoun
Rootमुनि
FormGender: Masculine; Case: Nominative; Number: Singular

भीष्म उवाच

B
Bhīṣma
K
kapālī (skull-bearing ascetic)
B
brahmahā (brahmin-slayer)
M
muni (sage)

Educational Q&A

Grave wrongdoing requires sustained, disciplined expiation: adopting austere marks of penance (kapālī), maintaining lifelong-like restraint (brahmacarya during the vow), and honestly acknowledging one’s deed rather than concealing it.

In Bhīṣma’s dharma-instruction during the Śānti Parva, he outlines a specific expiatory regimen for the sin of brahmin-slaying: a twelve-year skull-bearing ascetic observance combined with continual celibacy and public avowal of the act and the penance.