monotone
noun/ˈmɒnətəʊn/
/ˈmɑːnətəʊn/
[usually singular]- a sound or way of speaking in which the tone and volume remain the same and therefore seem boring
- He spoke in a flat monotone.
Word Originmid 17th cent.: from modern Latin monotonus, from late Greek monotonos.
Check pronunciation:
monotone