toswink means to toil excessively; work or labour hard. Lexicurio rates it Sui generis — a strength score of 88 out of 100.
Why “toswink” is a great word
TOSWINK — [Verb] To labor with extreme, exhaustive intensity, to toil past the point of ordinary exertion. From Middle English toswinken, from the intensive prefix to- (denoting completion or extremity) + swinken (to toil or labor). Unlike "toil," which suggests prolonged but purposeful effort, or "work," the neutral term for expended energy, toswink is labor driven to a state of near-dissolution. It is the deep, hopeless dig of a trench in sodden clay; the midnight scrubbing of a stone floor that will never gleam; the silent, furious knitting by a guttering candle—the body’s slow surrender to a task that consumes its own necessity, a grim arithmetic where effort far exceeds any visible gain.
Etymology
From Middle English toswinken, equivalent to to- + swink.
verb
- To toil excessively; work or labour hard.