1) (to cause a ball of wood, a knot etc) to become a straight piece, without twists; (of a person) to relax after a period of tension, exhausting work etc (unwind)
needing and using much energy and thought
difficult, hard to endure
dominating
absorbing
containing many details
itemized, particularized
exhausting
difficult, taxing
needing much effort
difficult; requiring hard labor
causing ruin
disastrous, devastating
using or needing great effort
difficult; requiring hard work
long, tiring and not interesting
dull, monotonous
annoying
irritating, exasperating
tiring (the usual word)
tiring
tiring; long and dull
burdensome
