arduous C2 Topic:Describing Qualities US /ˈɑɹ.d͡ʒu.əs/ UK /ˈɑː.djuː.əs/ See IPA manual Freq #26628 Meanings 1 adj Very difficult and tiring; requiring a lot of effort. The climb to the summit was long and arduous. Thesaurus Synonyms 1 adj · very difficult and tiring;... hardstrenuousstraining More burdensomedemandingexhaustingfatiguinglaboriousonerousstrugglesomeuphillwearisome Word family Derived forms arduouslyarduousnessunarduous Related forms arduity Appears in Phrases (1) See all arduous work a task requiring sustained concentration and considerable mental effort or skill Adjective + noun Etymology AI details From Latin arduus (“lofty, high, steep, hard to reach, difficult, laborious”), akin to Irish ard (“high”). *h₃erdʰ- Proto-Indo-European View etymology graph -> Topics Describing Qualities Word Formation & Derivatives External links Google Images Cambridge Dictionary Wiktionary # arduous **Type:** Word **Level:** C2 **Part of speech:** adj **IPA (US):** /ˈɑɹ.d͡ʒu.əs/ **IPA (UK):** /ˈɑː.djuː.əs/ **Frequency rank:** 26628 ## Meanings 1. Very difficult and tiring; requiring a lot of effort. ## Examples - The climb to the summit was long and arduous. ## Synonyms - burdensome - demanding - exhausting - fatiguing - laborious - onerous - strenuous - strugglesome - uphill - wearisome ## Derived Forms - arduously - arduousness - unarduous ## Related Forms - arduity ## Roots and Affixes - Root: *h₃erdʰ- ## Etymology From Latin arduus (“lofty, high, steep, hard to reach, difficult, laborious”), akin to Irish ard (“high”). ## AI Etymology Arduous is from Latin arduus (“lofty, high, steep, hard to reach, difficult, laborious”), akin to Irish ard (“high”). Important recorded forms include *h₃erdʰ- (Proto-Indo-European). Current senses include very difficult and tiring; requiring a lot of effort. The wider family includes derived forms such as arduously, arduousness, and unarduous and related words such as arduity. ## Topics - Describing Qualities - Word Formation & Derivatives markdown