महाभारतः mahābhārataḥ - book-12, chapter-290, verse-97

अनादिमध्यनिधनं निर्द्वंद्वं कर्तृ शाश्वतम् ।
कूटस्थं चैव नित्यं च यद्वदन्ति शमात्मकाः ॥९७॥

97. anādimadhyanidhanaṁ nirdvaṁdvaṁ kartṛ śāśvatam ,
kūṭasthaṁ caiva nityaṁ ca yadvadanti śamātmakāḥ.

97. anādimadhyanidhanam nirdvandvam kartṛ śāśvatam
kūṭastham ca eva nityam ca yat vadanti śamātmakaḥ

97. śamātmakaḥ yat anādimadhyanidhanam nirdvandvam
kartṛ śāśvatam ca eva nityam ca kūṭastham vadanti

97. Those who are tranquil in spirit (ātman) describe that (entity) which is without beginning, middle, or end, free from dualities, the eternal creator, and indeed immutable and perpetual.

Words meanings summery:

• अनादिमध्यनिधनम् (anādimadhyanidhanam) - without beginning, middle, or end

• निर्द्वन्द्वम् (nirdvandvam) - free from dualities, beyond pairs of opposites

• कर्तृ (kartṛ) - the creator, the doer, agent

• शाश्वतम् (śāśvatam) - eternal, perpetual, everlasting

• कूटस्थम् (kūṭastham) - immutable, unchangeable, standing firm

• च (ca) - and

• एव (eva) - indeed, certainly, only

• नित्यम् (nityam) - eternal, constant, perpetual

• च (ca) - and

• यत् (yat) - which, that which

• वदन्ति (vadanti) - they say, they speak, they describe

• शमात्मकः (śamātmakaḥ) - those whose minds are tranquil, self-controlled individuals

Words meanings and morphology

अनादिमध्यनिधनम् (anādimadhyanidhanam) - without beginning, middle, or end

(adjective)

Accusative, neuter, singular of anādimadhyanidhana

anādimadhyanidhana - that which has no beginning, middle, or end

निर्द्वन्द्वम् (nirdvandvam) - free from dualities, beyond pairs of opposites

(adjective)

Accusative, neuter, singular of nirdvandva

nirdvandva - free from dualities; beyond pleasure and pain, heat and cold, etc.

कर्तृ (kartṛ) - the creator, the doer, agent

(noun)

Accusative, neuter, singular of kartṛ

kartṛ - doer, agent, creator

agent noun

Derived from root kṛ with suffix -tṛ

Root: kṛ (class 8)

शाश्वतम् (śāśvatam) - eternal, perpetual, everlasting

(adjective)

Accusative, neuter, singular of śāśvata

śāśvata - eternal, everlasting, permanent, constant

कूटस्थम् (kūṭastham) - immutable, unchangeable, standing firm

(adjective)

Accusative, neuter, singular of kūṭastha

kūṭastha - standing firm like an anvil; immutable, unchangeable, unchanging, constant

च (ca) - and

(indeclinable)

एव (eva) - indeed, certainly, only

(indeclinable)

नित्यम् (nityam) - eternal, constant, perpetual

(adjective)

Accusative, neuter, singular of nitya

nitya - eternal, constant, perpetual, always existing, inherent

च (ca) - and

(indeclinable)

यत् (yat) - which, that which

(pronoun)

Accusative, neuter, singular of yad

yad - which, what, that (relative pronoun)

वदन्ति (vadanti) - they say, they speak, they describe

(verb)

3rd person , plural, active, present indicative (laṭ) of vad

Root: vad (class 1)

शमात्मकः (śamātmakaḥ) - those whose minds are tranquil, self-controlled individuals

(noun)

Nominative, masculine, plural of śamātmaka

śamātmaka - one whose self (ātman) is tranquility; tranquil-minded, self-controlled

Compound type : bahuvrīhi (śama+ātman)

• śama – tranquility, calmness, quietude
  noun (masculine)
  Root: śam (class 4)
• ātman – self, soul, spirit, essence
  noun (masculine)
  Root: an (class 2)