arduus

ard-uus

From a Proto-Italic *arðwos, from Proto-Indo-European *h₃r̥dʰwós, from *h₃erdʰ- + *-wós (whence Latin -uus). Cognate with Latin arbor (“tree”), Welsh ardd (“high; hill”), Old Irish ard (“high; height”), Ancient Greek ὀρθός (orthós, “aufrecht, ausgerichtet”), Sanskrit ऊर्ध्व (ūrdhvá, “rising upwards, high”).

Pronunciation

• (Classical Latin) IPA^(key): [ˈar.du.ʊs]
• (modern Italianate Ecclesiastical) IPA^(key): [ˈar.d̪u.us]

Adjective

arduus (feminine ardua, neuter arduum); first/second-declension adjective

1. lofty, high, steep, tall, elevated
2. hard to reach, difficult, laborious, arduous

   Nihil mortalibus ardui est.

   Nothing is hard for mortals. (Horace)

Declension

First/second-declension adjective.

	singular				plural
	masculine	feminine	neuter		masculine	feminine	neuter
nominative	arduus	ardua	arduum		arduī	arduae	ardua
genitive	arduī	arduae	arduī		arduōrum	arduārum	arduōrum
dative	arduō	arduae	arduō		arduīs
accusative	arduum	arduam	arduum		arduōs	arduās	ardua
ablative	arduō	arduā	arduō		arduīs
vocative	ardue	ardua	arduum		arduī	arduae	ardua