वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-1, chapter-47, verse-26

मम रूपं समास्थाय कृतवानसि दुर्मते ।
अकर्तव्यमिदं यस्माद्विफलस्त्वं भविष्यति ॥२६॥

26. mama rūpaṃ samāsthāya kṛtavānasi durmate ,
akartavyamidaṃ yasmādviphalastvaṃ bhaviṣyati.

26. mama rūpam samāsthāya kṛtavān asi durmate
akartavyam idam yasmāt viphalaḥ tvam bhaviṣyati

26. durmate yasmāt mama rūpam samāsthāya idam
akartavyam kṛtavān asi tvam viphalaḥ bhaviṣyati

26. O ill-minded one, because you have done this forbidden act by assuming my form, you will become fruitless (viphala).

Words meanings summery:

• मम (mama) - my, of me

• रूपम् (rūpam) - form, appearance, shape

• समास्थाय (samāsthāya) - having assumed, having adopted

• कृतवान् (kṛtavān) - one who has done, having done

• असि (asi) - you are

• दुर्मते (durmate) - O ill-minded one (referring to Indra) (O ill-minded one, O foolish one)

• अकर्तव्यम् (akartavyam) - that which ought not to be done, improper act, forbidden act

• इदम् (idam) - this

• यस्मात् (yasmāt) - because (because, since, from which)

• विफलः (viphalaḥ) - fruitless, impotent, unsuccessful

• त्वम् (tvam) - you

• भविष्यति (bhaviṣyati) - will be, will become

Words meanings and morphology

मम (mama) - my, of me

(pronoun)

Genitive, singular of asmad

asmad - I, me (first person pronoun)

रूपम् (rūpam) - form, appearance, shape

(noun)

Accusative, neuter, singular of rūpa

rūpa - form, shape, appearance, beauty

समास्थाय (samāsthāya) - having assumed, having adopted

(indeclinable)

absolutive (gerund)

formed with -ya suffix after upasargas

Prefixes: sam+ā

Root: sthā (class 1)

कृतवान् (kṛtavān) - one who has done, having done

(adjective)

Nominative, masculine, singular of kṛtavat

kṛtavat - having done, one who has done

past active participle

formed from root kṛ with -tavat suffix

Root: kṛ (class 8)

असि (asi) - you are

(verb)

2nd person , singular, active, present (laṭ) of as

Root: as (class 2)

दुर्मते (durmate) - O ill-minded one (referring to Indra) (O ill-minded one, O foolish one)

(noun)

Vocative, masculine, singular of durmati

durmati - evil-minded, foolish, one with bad intentions

Compound type : bahuvrīhi (dur+mati)

• dur – bad, evil, difficult
  indeclinable
  prefix indicating badness or difficulty
• mati – mind, thought, intelligence
  noun (feminine)

अकर्तव्यम् (akartavyam) - that which ought not to be done, improper act, forbidden act

(adjective)

Accusative, neuter, singular of akartavya

akartavya - not to be done, improper, forbidden

gerundive (kṛtya)

formed from root kṛ with -tavya suffix and negation prefix 'a'

Compound type : nañ-tatpuruṣa (a+kartavya)

• a – not, non-
  indeclinable
  negation prefix
• kartavya – to be done, proper
  gerundive (neuter)
  gerundive
  from root kṛ with -tavya suffix
  Root: kṛ (class 8)

इदम् (idam) - this

(pronoun)

Accusative, neuter, singular of idam

idam - this, this one

यस्मात् (yasmāt) - because (because, since, from which)

(indeclinable)

Note: Ablative singular of 'yad' used adverbially to mean 'because'.

विफलः (viphalaḥ) - fruitless, impotent, unsuccessful

(adjective)

Nominative, masculine, singular of viphala

viphala - without fruit, barren, fruitless, ineffectual

Compound type : bahuvrīhi (vi+phala)

• vi – without, deprived of, apart
  indeclinable
  prefix indicating separation or negation
• phala – fruit, result, consequence
  noun (neuter)

त्वम् (tvam) - you

(pronoun)

Nominative, singular of yuṣmad

yuṣmad - you (second person pronoun)

भविष्यति (bhaviṣyati) - will be, will become

(verb)

3rd person , singular, active, future (lṛṭ) of bhū

Root: bhū (class 1)

Note: Grammatically 3rd person singular, though in context with 'tvam' (you) might imply a general statement or poetic license for a 2nd person action.