LABOURED

heavy, labored, laboured

(adjective) requiring or showing effort; “heavy breathing”; “the subject made for labored reading”

labored, laboured, strained

(adjective) lacking natural ease; “a labored style of debating”

Source: WordNet® 3.1

Verb

laboured

simple past tense and past participle of labour

Adjective

laboured (comparative more laboured, superlative most laboured)

Expressive of strenuous effort.

Of writing or speech or similar, stilted or not natural due to too much effort being used in the production.

Source: Wiktionary