Vocabulary/Arduous

Arduous Definition
/ˈärjo͞oəs/ - adjective

1.) Involving or requiring strenuous effort; difficult and tiring.

Examples

 * The journey he took was arduous.
 * Catching that freaking Snorlax from Pokémon GO was an arduous adventure.

Synonyms
onerous, taxing, difficult, hard, heavy, laborious, burdensome, strenuous, vigorous, back-breaking; demanding, tough, challenging, formidable; exhausting, tiring, punishing, grueling; uphill, steep; informal: killing; toilsome

Antonyms
easy, simple