1. arduous: adjective Spanish: Definition: Origin:
requiring strenuous effort
requiring much energy
Origin:
Latin arduus high, steep, difficult; akin to Old Irish ard high
First Known Use: 1538
Spanish:
arduo

2. The twelve day arduous trek to base camp is quite dangerous.
pronunciation:
ärjo͞oəs
The twelve day arduous trek to base camp is quite dangerous.

3. arduous Related Forms: arduously – adverb arduousness - noun

4. arduous synonyms: antonyms: strenuous wearisome easy effortless simple
difficult
strenuous
wearisome
antonyms:
easy
effortless
simple

5. arduous Soldiers need to be tested in the most arduous terrain.
Playing the piano may seem arduous at first, but it gets easier with practice.
Needless to say, mastering a foreign language is an arduous challenge.