The following mantra appears at the end of Narayana Sukta:
ṛtagṃ satyaṃ pa’raṃ brahma puruṣa’ṃ kṛṣṇapiṅga’lam |
ūrdhvare’taṃ vi’rūpā’kṣaṃ viśvarū’pāya vai namo nama’ḥ ||
All the words appearing in the mantra denote a quality of Narayana: ṛtam indicates that He is order, satyam means He is truth, virupaksha means that He is all-seeing etc. In the same vein, what does Urdhwaretam mean?