tug

tug (http://definr.com/tug)

     n 1: a sudden abrupt pull [syn: jerk]
     2: a powerful small boat designed to pull or push larger ships
        [syn: tugboat, towboat, tower]
     v 1: pull hard; "The prisoner tugged at the chains"; "This movie
          tugs at the heart strings"
     2: exert oneself, 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" [syn: labor, labour, push, drive]
     3: tow (a vessel) with a tug; "The tugboat tugged the freighter
        into the harbor"
     4: carry with difficulty; "You'll have to lug this suitcase"
        [syn: lug, tote]
     5: move by pulling hard: "The horse finally tugged the cart out
        of the mud"
     6: pull or strain hard at; "Each oar was tugged by several men"
     7: struggle in opposition; "She tugged and wrestled with her
        conflicts"