वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-6, chapter-25, verse-6

समर्था गगनं गन्तुमपि वा त्वं रसातलम् ।
अवगच्छाम्यकर्तव्यं कर्तव्यं ते मदन्तरे ॥६॥

6. samarthā gaganaṃ gantumapi vā tvaṃ rasātalam ,
avagacchāmyakartavyaṃ kartavyaṃ te madantare.

6. samarthā gaganam gantum api vā tvam rasātalam
avagacchāmi akartavyam kartavyam te mat-antare

6. tvam samarthā gaganam gantum api vā rasātalam (asi).
(aham) te mat-antare akartavyam kartavyam avagacchāmi

6. You are capable of going to the sky or even the netherworld. I understand what you should and should not do concerning me.

Words meanings summery:

• समर्था (samarthā) - capable, able (feminine)

• गगनम् (gaganam) - sky, atmosphere

• गन्तुम् (gantum) - to go, to reach

• अपि (api) - even, also

• वा (vā) - or

• त्वम् (tvam) - you

• रसातलम् (rasātalam) - netherworld, lowest region

• अवगच्छामि (avagacchāmi) - I understand, I know

• अकर्तव्यम् (akartavyam) - what is not to be done, improper, impermissible

• कर्तव्यम् (kartavyam) - what is to be done, proper, duty

• ते (te) - your, to you

• मत्-अन्तरे (mat-antare) - concerning me, regarding me, in my matter

Words meanings and morphology

समर्था (samarthā) - capable, able (feminine)

(adjective)

Nominative, feminine, singular of samartha

samartha - capable, able, competent, strong, suitable

Prefix: sam

Root: arth (class 10)

गगनम् (gaganam) - sky, atmosphere

(noun)

Accusative, neuter, singular of gagana

gagana - sky, atmosphere, firmament

गन्तुम् (gantum) - to go, to reach

(infinitive)

अपि (api) - even, also

(indeclinable)

वा (vā) - or

(indeclinable)

त्वम् (tvam) - you

(pronoun)

Nominative, singular of yuṣmad

yuṣmad - you (singular)

रसातलम् (rasātalam) - netherworld, lowest region

(noun)

Accusative, neuter, singular of rasātala

rasātala - the netherworld, the lowest of the seven underworlds

Compound type : tatpurusha (rasā+tala)

• rasā – earth, moisture, juice
  noun (feminine)
• tala – bottom, surface, level, plane
  noun (neuter)

अवगच्छामि (avagacchāmi) - I understand, I know

(verb)

1st person , singular, active, present (laṭ) of avagacchāmi

Prefix: ava

Root: gam (class 1)

अकर्तव्यम् (akartavyam) - what is not to be done, improper, impermissible

(gerundive)

Compound type : nañ-tatpuruṣa (a+kartavya)

• a – not, non-, un-
  indeclinable
• kartavya – to be done, proper, duty, obligation
  gerundive (neuter)
  Gerundive
  Derived from root 'kṛ' (to do) with 'tavya' suffix.
  Root: kṛ (class 8)

कर्तव्यम् (kartavyam) - what is to be done, proper, duty

(gerundive)

ते (te) - your, to you

(pronoun)

Genitive, singular of yuṣmad

yuṣmad - you (singular)

Note: Alternate form for tava

मत्-अन्तरे (mat-antare) - concerning me, regarding me, in my matter

(noun)

Locative, neuter, singular of mat-antara

mat-antara - concerning me, in my case, within my presence/matter

Compound type : tatpurusha (mad+antara)

• mad – me (stem form of aham)
  pronoun
• antara – inside, amidst, between, interval, difference, concerning
  noun (neuter)