महाभारतः mahābhārataḥ - book-10, chapter-15, verse-23

अस्त्रं ब्रह्मशिरो यत्र परमास्त्रेण वध्यते ।
समा द्वादश पर्जन्यस्तद्राष्ट्रं नाभिवर्षति ॥२३॥

23. astraṁ brahmaśiro yatra paramāstreṇa vadhyate ,
samā dvādaśa parjanyastadrāṣṭraṁ nābhivarṣati.

23. astram brahmaśiraḥ yatra paramāstreṇa vadhyate
samā dvādaśa parjanyaḥ tat rāṣṭram na abhivarṣati

23. yatra brahmaśiraḥ astram paramāstreṇa vadhyate,
tat rāṣṭram dvādaśa samāḥ parjanyaḥ na abhivarṣati

23. Where the Brahmashira (astra) weapon is counteracted by a supreme weapon, for twelve years the rain god (parjanya) does not shower upon that kingdom.

Words meanings summery:

• अस्त्रम् (astram) - weapon, missile

• ब्रह्मशिरः (brahmaśiraḥ) - Brahmashira (weapon)

• यत्र (yatra) - where, in which (place/case)

• परमास्त्रेण (paramāstreṇa) - by the supreme weapon

• वध्यते (vadhyate) - is killed, is struck, is obstructed, is overcome

• समा (samā) - years

• द्वादश (dvādaśa) - twelve

• पर्जन्यः (parjanyaḥ) - rain god, cloud, rain

• तत् (tat) - that

• राष्ट्रम् (rāṣṭram) - kingdom, nation, country

• न (na) - not, no

• अभिवर्षति (abhivarṣati) - rains upon, showers upon

Words meanings and morphology

अस्त्रम् (astram) - weapon, missile

(noun)

Nominative, neuter, singular of astra

astra - weapon, missile, projectile

ब्रह्मशिरः (brahmaśiraḥ) - Brahmashira (weapon)

(noun)

Nominative, neuter, singular of brahmaśiras

brahmaśiras - the head of Brahma; a divine weapon associated with Brahma

Compound type : tatpurusha (brahman+śiras)

• brahman – Brahma (the creator god), the Absolute, sacred knowledge
  proper noun (neuter)
• śiras – head, peak, top
  noun (neuter)

यत्र (yatra) - where, in which (place/case)

(indeclinable)

परमास्त्रेण (paramāstreṇa) - by the supreme weapon

(noun)

Instrumental, neuter, singular of paramāstra

paramāstra - supreme weapon, ultimate missile

Compound type : karmadharaya (parama+astra)

• parama – supreme, highest, ultimate, excellent
  adjective
• astra – weapon, missile
  noun (neuter)

वध्यते (vadhyate) - is killed, is struck, is obstructed, is overcome

(verb)

3rd person , singular, passive, present (laṭ) of vadh

Root 'vadh' in the present passive form.

Root: vadh (class 1)

समा (samā) - years

(noun)

Accusative, feminine, plural of samā

samā - year, season, time

Note: Used as accusative of duration of time.

द्वादश (dvādaśa) - twelve

(adjective)

plural of dvādaśan

dvādaśan - twelve

Note: Used adjectivally with 'samāḥ'.

पर्जन्यः (parjanyaḥ) - rain god, cloud, rain

(noun)

Nominative, masculine, singular of parjanya

parjanya - rain god, cloud, rain

तत् (tat) - that

(pronoun)

Nominative, neuter, singular of tad

tad - that, this, he, she, it

Note: Modifies 'rāṣṭram'.

राष्ट्रम् (rāṣṭram) - kingdom, nation, country

(noun)

Nominative, neuter, singular of rāṣṭra

rāṣṭra - kingdom, nation, country, empire

न (na) - not, no

(indeclinable)

अभिवर्षति (abhivarṣati) - rains upon, showers upon

(verb)

3rd person , singular, active, present (laṭ) of abhivarṣati

Derived from root 'vṛṣ' (to rain) with prefix 'abhi' (towards, upon).

Prefix: abhi

Root: vṛṣ (class 1)