humdrum[adjective]Synonyms: dull, banal, boring, dreary, monotonous, mundane, ordinary, tedious, tiresome, uneventful  
English Thesaurus: boring, not very interesting, dull, tedious, monotonous, ... [TahlilGaran] English Synonym Dictionary ▲
 hum‧drum /ˈhʌmdrʌm/ 
 adjective[
Date: 1500-1600; 
Origin: hum]
 boring and ordinary, and having no variety or interest
 Synonym : tedioushumdrum existence/job/life etc
 the prisoners’ humdrum routine  [TahlilGaran] Dictionary of Contemporary English ▲
 boring not interesting in any way: 
 a boring speech 
 He found school incredibly boring.not very interesting [not before noun] very ordinary and therefore rather boring. People often use this phrase in everyday English, instead of saying directly that something is 
boring: 
 The story wasn’t very interesting.dull especially written boring: 
 The conference was usually a dull affair. 
 Life was never dull.tedious /ˈtiːdiəs/ very boring and continuing for a long time: 
 The process was tedious and slow. 
 Jake began the tedious task of sorting through his papers.monotonous /məˈnɒt
ənəs $ məˈnɑː-/ boring and always the same: 
 The work was monotonous and unchallenging. 
 He was only half listening to the monotonous voice of the teacher.mundane /mʌnˈdeɪn/ rather boring, because it is connected with things you do regularly as part of your daily life: 
 He busied himself with the mundane task of cleaning the house. 
 Most arguments are over mundane issues like spending or saving money.humdrum /ˈhʌmdrʌm/
 [usually before noun] boring because nothing new or interesting ever happens: 
 He wanted to escape his humdrum life. 
 a humdrum existencedry a subject, piece of writing etc that is dry is boring because it is very serious and does not contain any humour: 
 The students complained that the lecture was dry and uninspiring. 
 a dry academic volume [TahlilGaran] English Thesaurus ▲