1) Awkward 2) Did drudgery 3) Done with great effort 4) Drudged 5) Expended effort 6) Laboured 7) Lacking natural ease 8) Lacking spontaneity 9) Requiring effort 10) Requiring or showing effort 11) Slaved away 12) Strained 13) Struggled 14) Toiled 15) Toiled away 16) Unnatural; stiff 17) Worked hard 1) Effortful 2) Laboured 3) Slaved 4) Strained 5) Strove 6) Toiled 
• (imp. & p. p.) of Labor • (a.) Bearing marks of labor and effort; elaborately wrought; not easy or natural; as, labored poetry; a labored style.
La'bored adjective Bearing marks of labor and effort; elaborately wrought; not easy or natural; as, labored poetry; a labored style. 
[adj] - lacking natural ease
labored 1. Done with obvious effort or difficulty; such as, labored breathing or labored walking. 2. Lacking natural ease and grace: 'He was a speaker who made many unnecessary labored repetitions and hesitations.' 3. Exhibiting a great deal of effort; lacking grace, fluency, or spontaneity.
laboured adjective requiring or showing effort; `heavy breathing`; `the subject made for labored reading`laboured adjective lacking natural ease; `a labored style of debating`