laborious

adj.

1. Marked by or requiring long, hard work: spent many laborious hours on the project.
2. Hard-working; industrious.

[Middle English, from Old French laborieux, from Latin labōriōsus, from labor, labor.]

laboriously la·bo'ri·ous·ly adv.
laboriousness la·bo'ri·ous·ness n.

adjective

1. Requiring great or extreme bodily, mental, or spiritual strength: arduous, backbreaking, burdensome, demanding, difficult, effortful, exacting, exigent, formidable, hard, heavy, onerous, oppressive, rigorous, rough, severe, taxing, tough, trying, weighty. See heavy/light.
2. Not easy to do, achieve, or master: arduous, difficult, hard, serious, tall, tough, uphill. See easy/hard.

adj

Definition: hard, difficult
Antonyms: easy, effortless, facile, simple, trivial

adj

Definition: hard-working
Antonyms: effortless, idle, lackadaisical, lazy, reticent

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IN BRIEF: Taking or requiring much effort.

To build may have to be the slow and laborious task of years. To destroy can be the thoughtless act of a single day. — Winston Churchill (1874-1965)

Dansk (Danish)
adj. - anstrengende, træls, besværlig, tung, møjsommelig

Nederlands (Dutch)
moeizaam, omslachtig, uitgebreid, bewerkelijk

Français (French)
adj. - laborieux, circonstancié

Deutsch (German)
adj. - mühsam, schwerfällig

Ελληνική (Greek)
adj. - επίπονος, κοπιαστικός

Italiano (Italian)
laborioso, solerte

Português (Portuguese)
adj. - laborioso, trabalhoso

Русский (Russian)
трудоемкий, работящий

Español (Spanish)
adj. - laborioso, penoso, difícil, extenso, prolijo

Svenska (Swedish)
adj. - mödosam, tung

中文（简体）(Chinese (Simplified))
费力的, 吃力的, 牵强的, 勤勉的, 生硬的

中文（繁體）(Chinese (Traditional))
adj. - 費力的, 吃力的, 牽強的, 勤勉的, 生硬的

한국어 (Korean)
adj. - 힘드는 , 부지런한, 곤란한, 부자연스러운

日本語 (Japanese)
adj. - 骨の折れる, 困難な, 勤勉な, 苦心した跡の見える

العربيه (Arabic)
‏(صفه) كاد, مجد‏

עברית (Hebrew)
adj. - ‮מפרכת (משימה), מאומץ, קשה, חרוץ, עובד קשה, לא קולח (סגנון), מייגע‬

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