The Collaborative International Dictionary of English v.0.48:
Irksome \Irk"some\, a.
1. Wearisome; tedious; disagreeable or troublesome by reason
of long continuance or repetition; as, irksome hours;
For not to irksome toil, but to delight,
He made us. --Milton.
2. Weary; vexed; uneasy. [Obs.]
Let us therefore learn not to be irksome when God
layeth his cross upon us. --Latimer.
Syn: Wearisome; tedious; tiresome; vexatious; burdensome.
Usage: Irksome, Wearisome, Tedious. These epithets
describe things which give pain or disgust. Irksome is
applied to something which disgusts by its nature or
quality; as, an irksome task. Wearisome denotes that
which wearies or wears us out by severe labor; as,
wearisome employment. Tedious is applied to something
which tires us out by the length of time occupied in
its performance; as, a tedious speech.
Wearisome nights are appointed to me. --Job vii.
Pity only on fresh objects stays,
But with the tedious sight of woes decays.
-- Irk"some*ly, adv. -- Irk"some*ness, n.