a. 费力的, 辛苦的, 劳苦的

[ adj ]
characterized by effort to the point of exhaustion; especially physical effort
<adj.all>
worked their arduous way up the mining valleya grueling campaign
hard labor
heavy work
heavy going
spent many laborious hours on the project
set a punishing pace

Toilsome \Toil"some\ (toil"s[u^]m), a.
Attended with toil, or fatigue and pain; laborious;
wearisome; as, toilsome work.

What can be toilsome in these pleasant walks? --Milton.
※ -- {Toil"some*ly}, adv. -- {Toil"some*ness},
n.