योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-74, verse-2

एकपादं तपस्यन्तीं शुष्यन्तीं शिरऊष्मणा ।
सततानशनां शुष्कपिण्डीभूतोदरत्वचम् ॥ २ ॥

ekapādaṃ tapasyantīṃ śuṣyantīṃ śiraūṣmaṇā ,
satatānaśanāṃ śuṣkapiṇḍībhūtodaratvacam 2

2. ekapādam tapasyantīm śuṣyantīm śiraḥ ūṣmaṇā
satataanśanām śuṣkapiṇḍībhūtodaratvacam

2. (tām sūcīm) ekapādam tapasyantīm,
śiraḥ ūṣmaṇā śuṣyantīm,
satataanśanām,
śuṣkapiṇḍībhūtodaratvacam (saḥ dadarśa)

2. (He saw her) performing intense ascetic practices (tapas) on one leg, wasting away from the heat generated by her head, constantly fasting, her belly and skin having become a shriveled lump.

Words meanings summery:

• एकपादम् (ekapādam) - standing on a single leg, indicative of severe ascetic posture (on one foot, with one leg)

• तपस्यन्तीम् (tapasyantīm) - engaged in severe spiritual discipline (tapas) (performing austerities (tapas), practicing penance)

• शुष्यन्तीम् (śuṣyantīm) - becoming emaciated and weakened (wasting away, drying up)

• शिरः (śiraḥ) - her own head (head)

• ऊष्मणा (ūṣmaṇā) - due to the internal heat generated by severe austerity (by heat, by warmth)

• सततअन्शनाम् (satataanśanām) - maintaining an uninterrupted fast (continuously fasting, always without food)

• शुष्कपिण्डीभूतोदरत्वचम् (śuṣkapiṇḍībhūtodaratvacam) - describing extreme emaciation, with shrunken abdomen and shriveled skin (whose belly and skin have become a dry lump)

Words meanings and morphology

एकपादम् (ekapādam) - standing on a single leg, indicative of severe ascetic posture (on one foot, with one leg)

(adjective)

Accusative, feminine, singular of ekapāda

ekapāda - one-footed, single-legged

Compound type : Bahuvrīhi (eka+pāda)

• eka – one, single
  numeral (masculine/feminine/neuter)
• pāda – foot, leg
  noun (masculine)

Note: Adjective for sūcīm (implied).

तपस्यन्तीम् (tapasyantīm) - engaged in severe spiritual discipline (tapas) (performing austerities (tapas), practicing penance)

(adjective)

Accusative, feminine, singular of tapasyantī

tapasyantī - performing austerities

Present Active Participle

From verb tapasyati (to perform tapas), derived from noun tapas + ya (denominative) + śatṛ/śānac (participle suffix).

Root: tapas (class 4)

शुष्यन्तीम् (śuṣyantīm) - becoming emaciated and weakened (wasting away, drying up)

(adjective)

Accusative, feminine, singular of śuṣyantī

śuṣyantī - wasting away, drying up

Present Active Participle

From root śuṣ (to dry) + ya (shyan) + śatṛ/śānac (participle suffix).

Root: śuṣ (class 4)

शिरः (śiraḥ) - her own head (head)

(noun)

neuter, singular of śiras

śiras - head

Note: (śiraḥ + ūṣmaṇā) by head's heat.

ऊष्मणा (ūṣmaṇā) - due to the internal heat generated by severe austerity (by heat, by warmth)

(noun)

Instrumental, masculine, singular of ūṣman

ūṣman - heat, warmth, vapor

From root uṣ 'to burn'.

Root: uṣ (class 1)

Note: Means "by the heat (of the head)".

सततअन्शनाम् (satataanśanām) - maintaining an uninterrupted fast (continuously fasting, always without food)

(adjective)

Accusative, feminine, singular of satataanśanā

satataanśanā - continuously fasting

Compound type : Karmadhāraya (satata+anaśanā)

• satata – continuous, constant
  adjective (masculine/feminine/neuter)
• anaśanā – fasting, without food
  noun (feminine)
  a + anaśana (without eating)
  Prefix: a
  Root: aś (class 9)

शुष्कपिण्डीभूतोदरत्वचम् (śuṣkapiṇḍībhūtodaratvacam) - describing extreme emaciation, with shrunken abdomen and shriveled skin (whose belly and skin have become a dry lump)

(adjective)

Accusative, feminine, singular of śuṣkapiṇḍībhūtodaratvaca

śuṣkapiṇḍībhūtodaratvaca - whose belly and skin have become a dry lump

Compound type : Bahuvrīhi (śuṣka+piṇḍībhūta+udara+tvac)

• śuṣka – dry, withered
  adjective (masculine/feminine/neuter)
  Past Passive Participle
  from root śuṣ 'to dry'
  Root: śuṣ (class 4)
• piṇḍībhūta – become a lump/mass
  adjective (masculine/feminine/neuter)
  Past Passive Participle
  from verb piṇḍī-bhū 'to become a lump'
  Root: bhū (class 1)
• udara – belly, abdomen
  noun (neuter)
• tvac – skin
  noun (feminine)