laboring
— Adjective
– English
～ doing arduous or unpleasant work; "drudging peasants"; "the bent backs of laboring slaves picking cotton"; "toiling coal miners in the black deeps"
laborious
— Adjective
– English
～ characterized by 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"
laboriously
— Adverb
– English
～ in a laborious manner; "their lives were spent in committee making decisions for others to execute on the basis of data laboriously gathered for them"
laboriousness
— Noun
– English
～ the quality of requiring extended effort