S: (v) tug (pull hard) "The prisoner tugged at the chains"; "This movie tugs at the heart strings"
S: (v) tug, labor, labour, push, drive (strive and make an effort to reach a goal) "She tugged for years to make a decent living"; "We have to push a little to make the deadline!"; "She is driving away at her doctoral thesis"
S: (v) tug (tow (a vessel) with a tug) "The tugboat tugged the freighter into the harbor"
S: (v) lug, tote, tug (carry with difficulty) "You'll have to lug this suitcase"