Wearisome (adjective)

1. Tiresome through length or dullness.
2. Causing weariness or fatigue.
3. Tedious or monotonous.

Origin:

Middle english werisome, from old english wǣrsum; akin to old high german wersam wearisome, latin vastus empty.

Examples:

1. The lecture was wearisome and I found it hard to stay awake.
2. The journey was wearisome and we were all tired by the end.
3. The paperwork was wearisome and seemed never-ending.
4. The constant chatter was wearisome and I wished for some peace and quiet.
5. The wearisome routine of the daily commute was getting to him.