TEDIUM
tediousness, tedium, tiresomeness
(noun) dullness owing to length or slowness
boredom, ennui, tedium
(noun) the feeling of being bored by something tedious
Source: WordNet® 3.1
Etymology
Noun
tedium (usually uncountable, plural tediums or tedia)
Boredom or tediousness; ennui.
Synonyms
• boredom, drudgery, ennui, tediousness
Source: Wiktionary
Te"di*um, n. Etym: [L. taedium, fr. taedet it disgusts, it wearies
one.]
Definition: Irksomeness; wearisomeness; tediousness. [Written also tædium.]
Cowper.
To relieve the tedium, he kept plying them with all manner of bams.
Prof. Wilson.
The tedium of his office reminded him more strongly of the willing
scholar, and his thoughts were rambling. Dickens.
Source: Webster’s Unabridged Dictionary 1913 Edition