महाभारतः mahābhārataḥ - book-13, chapter-58, verse-14

आशीविषसमेभ्यश्च तेभ्यो रक्षस्व भारत ।
तान्युक्तैरुपजिज्ञास्य तथा द्विजवरोत्तमान् ॥१४॥

14. āśīviṣasamebhyaśca tebhyo rakṣasva bhārata ,
tānyuktairupajijñāsya tathā dvijavarottamān.

14. āśīviṣasamebhyaḥ ca tebhyaḥ rakṣasva bhārata
tān yuktaiḥ upajijñāsya tathā dvijavarottamān

14. And protect yourself, O Bhārata, from those who are like venomous serpents. You should investigate them, and likewise the best among the excellent twice-born, through appropriate means.

Words meanings summery:

• आशीविषसमेभ्यः (āśīviṣasamebhyaḥ) - from those similar to venomous serpents, from those equal to snakes whose breath is poison

• च (ca) - and

• तेभ्यः (tebhyaḥ) - from them, to them

• रक्षस्व (rakṣasva) - protect yourself

• भारत (bhārata) - O Yudhiṣṭhira (O descendant of Bharata, O Bhārata)

• तान् (tān) - them, those (masculine)

• युक्तैः (yuktaiḥ) - by suitable/appropriate ones, by means of those who are suitable

• उपजिज्ञास्य (upajijñāsya) - you should inquire (one should inquire about, to be investigated)

• तथा (tathā) - thus, so, in the same way, likewise

• द्विजवरोत्तमान् (dvijavarottamān) - the best among the excellent twice-born (brāhmaṇas)

Words meanings and morphology

आशीविषसमेभ्यः (āśīviṣasamebhyaḥ) - from those similar to venomous serpents, from those equal to snakes whose breath is poison

(adjective)

Ablative, masculine, plural of āśīviṣasama

āśīviṣasama - similar to a venomous serpent

Compound type : bahuvrīhi (āśīviṣa+sama)

• āśīviṣa – a venomous serpent, a snake whose breath is poison
  noun (masculine)
• sama – equal, similar, like
  adjective (masculine)

Note: applies to 'tebhyaḥ'

च (ca) - and

(indeclinable)

तेभ्यः (tebhyaḥ) - from them, to them

(pronoun)

Ablative, masculine, plural of tad

tad - that, those

Note: refers to the 'venomous serpent-like' individuals

रक्षस्व (rakṣasva) - protect yourself

(verb)

2nd person , singular, middle, imperative (loṭ) of rakṣ

Root: rakṣ (class 1)

भारत (bhārata) - O Yudhiṣṭhira (O descendant of Bharata, O Bhārata)

(proper noun)

Vocative, masculine, singular of bhārata

bhārata - descendant of Bharata, relating to Bharata

तान् (tān) - them, those (masculine)

(pronoun)

Accusative, masculine, plural of tad

tad - that, those

Note: refers to the 'venomous serpent-like' individuals again

युक्तैः (yuktaiḥ) - by suitable/appropriate ones, by means of those who are suitable

(adjective)

Instrumental, masculine, plural of yukta

yukta - joined, connected, appropriate, fit, engaged

Past Passive Participle

derived from root yuj (to join, to harness)

Root: yuj (class 7)

Note: can imply 'by suitable agents' or 'by appropriate methods'

उपजिज्ञास्य (upajijñāsya) - you should inquire (one should inquire about, to be investigated)

(gerundive)

Note: Can be interpreted as an imperative 'you should inquire' in context.

तथा (tathā) - thus, so, in the same way, likewise

(indeclinable)

द्विजवरोत्तमान् (dvijavarottamān) - the best among the excellent twice-born (brāhmaṇas)

(noun)

Accusative, masculine, plural of dvijavarottama

dvijavarottama - the best of excellent brāhmaṇas

Compound type : tatpurusha (dvija+vara+uttama)

• dvija – twice-born (a brāhmaṇa, kṣatriya, vaiśya; also a bird, a tooth)
  noun (masculine)
• vara – excellent, best, boon, desired object
  adjective (masculine)
• uttama – best, highest, supreme
  adjective (masculine)

Note: Object of upajijñāsya