योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-81, verse-89

प्रत्यक्षवदभावोऽपि प्रमैव रघुनन्दन ।
अग्न्यभावोऽपि शीतस्य प्रमाणं सर्वजन्तुषु ॥ ८९ ॥

pratyakṣavadabhāvo'pi pramaiva raghunandana ,
agnyabhāvo'pi śītasya pramāṇaṃ sarvajantuṣu 89

89. pratyakṣavat abhāvaḥ api pramā eva raghunandana |
agni-abhāvaḥ api śītasya pramāṇam sarva-jantuṣu ||

89. raghunandana pratyakṣavat abhāvaḥ api pramā eva
sarva-jantuṣu śītasya agni-abhāvaḥ api pramāṇam

89. O scion of Raghu (raghunandana), the absence of something, just like direct perception, is indeed a valid means of knowledge (pramā). For all living beings, the absence of fire (agni) is also a proof (pramāṇa) of cold.

Words meanings summery:

• प्रत्यक्षवत् (pratyakṣavat) - like direct perception, as in the case of perception

• अभावः (abhāvaḥ) - a valid means of knowledge (pramāṇa) of absence (absence, non-existence)

• अपि (api) - also, even, too

• प्रमा (pramā) - valid knowledge, true cognition, valid means of knowledge (pramāṇa)

• एव (eva) - indeed, certainly, only, just

• रघुनन्दन (raghunandana) - addressed to a listener or student, implying a noble lineage or quality (O descendant of Raghu, joy of the Raghus)

• अग्नि-अभावः (agni-abhāvaḥ) - absence of fire (agni)

• अपि (api) - also, even, too

• शीतस्य (śītasya) - of cold, relating to cold

• प्रमाणम् (pramāṇam) - proof, evidence, valid means of knowledge (pramāṇa), measure

• सर्व-जन्तुषु (sarva-jantuṣu) - among all living beings/creatures

Words meanings and morphology

प्रत्यक्षवत् (pratyakṣavat) - like direct perception, as in the case of perception

(indeclinable)

Formed with the vat suffix meaning 'like, similar to'.

अभावः (abhāvaḥ) - a valid means of knowledge (pramāṇa) of absence (absence, non-existence)

(noun)

Nominative, masculine, singular of abhāva

abhāva - absence, non-existence, non-being

Compound type : tatpuruṣa (a+bhāva)

• a – not, non-
  indeclinable
• bhāva – being, existence, state, nature, emotion
  noun (masculine)
  Root: bhū (class 1)

अपि (api) - also, even, too

(indeclinable)

प्रमा (pramā) - valid knowledge, true cognition, valid means of knowledge (pramāṇa)

(noun)

Nominative, feminine, singular of pramā

pramā - valid knowledge, true cognition, correct apprehension

Prefix: pra

Root: mā (class 3)

एव (eva) - indeed, certainly, only, just

(indeclinable)

रघुनन्दन (raghunandana) - addressed to a listener or student, implying a noble lineage or quality (O descendant of Raghu, joy of the Raghus)

(proper noun)

Vocative, masculine, singular of raghunandana

raghunandana - descendant of Raghu, joy of the Raghus (an epithet for Rama)

Compound type : tatpuruṣa (raghu+nandana)

• raghu – a legendary king, ancestor of Rāma
  proper noun (masculine)
• nandana – son, descendant, rejoicer, delight
  noun (masculine)
  Root: nand (class 1)

अग्नि-अभावः (agni-abhāvaḥ) - absence of fire (agni)

(noun)

Nominative, masculine, singular of agni-abhāva

agni-abhāva - absence of fire

Compound type : ṣaṣṭhī-tatpuruṣa (agni+abhāva)

• agni – fire, the deity Agni
  noun (masculine)
• abhāva – absence, non-existence
  noun (masculine)

अपि (api) - also, even, too

(indeclinable)

शीतस्य (śītasya) - of cold, relating to cold

(noun)

Genitive, neuter, singular of śīta

śīta - cold, cool, frigid

Past Passive Participle

Root śyai (to solidify, freeze) or śī (to lie down, rest); participle meaning 'cooled, cold'.

Root: śyai (class 1)

प्रमाणम् (pramāṇam) - proof, evidence, valid means of knowledge (pramāṇa), measure

(noun)

Nominative, neuter, singular of pramāṇa

pramāṇa - proof, evidence, authority, standard, measure, valid knowledge

Prefix: pra

Root: mā (class 3)

सर्व-जन्तुषु (sarva-jantuṣu) - among all living beings/creatures

(noun)

Locative, masculine, plural of sarva-jantu

sarva-jantu - all living beings, every creature

Compound type : karmadhāraya (sarva+jantu)

• sarva – all, every, whole
  adjective
• jantu – living being, creature, animal
  noun (masculine)
  Root: jan (class 4)