Easy to difficult

arduous
(adj)
ARE-dyoo-ǝs
Meaning

hard; difficult; strenuous; effortful

1st Sample Sentence

A PhD in any subject involves years of arduous work.

Root

arduus (high, steep, difficult) (Latin)

Antonyms

facile

Mnemonics

arduous = read it as: "hard to do for us"

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