(ת') מפרך, מייגע; קשה, מאומץ; חרוץ; מאולץ; חסר חן, כבד, לא קולח

adj. tiresome, exhausting; hard, strenuous; constrained; dull, without spontaneity; industrious, diligent; careful and attentive to detail

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Adjective
1. characterized by toilsome effort to the point of exhaustion; especially physical effort; "worked their arduous way up the mining valley"; "a grueling campaign"; "hard labor"; "heavy work"; "heavy going"; "spent many laborious hours on the project"; "set a punishing pace"
(synonym) arduous, backbreaking, grueling, gruelling, hard, heavy, punishing, toilsome
(similar) effortful

příd.jm. pracný

Przym. żmudny; mozolny

(a.)
Requiring labor, perseverance, or sacrifices; toilsome; tiresome.
  

(a.)
Devoted to labor; diligent; industrious; as, a laborious mechanic.