struggle in opposition; "She tugged and wrestled with her conflicts"
pull hard; "The prisoner tugged at the chains"; "This movie tugs at the heart strings"
pull or strain hard at; "Each oar was tugged by several men"
move by pulling hard; "The horse finally tugged the cart out of the mud"
tow (a vessel) with a tug; "The tugboat tugged the freighter into the harbor"
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"
seemingly without interruption; chiefly restricted to what recurs regularly or frequently in a prolonged and closely spaced series; "the continual banging of the shutters"
`continual' (meaning seemingly uninterrupted) is often used interchangeably with `continuous' (meaning without interruption)
uninterrupted in time and indefinitely long continuing; "the ceaseless thunder of surf"; "in constant pain"; "night and day we live with the incessant noise of the city"; "the never-ending search for happiness"; "the perpetual struggle to maintain standards in a democracy"; "man's unceasing warfare with drought and isolation"; "unremitting demands of hunger"
showing sustained enthusiastic action with unflagging vitality; "an indefatigable advocate of equal rights"; "a tireless worker"; "unflagging pursuit of excellence"
not capable of being conquered or vanquished or overcome; "a tribute to his courage...and his unconquerable will"- R.E.Danielson; "faced unconquerable difficulties"