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
单调;单调的声音 - He spoke in a flat monotone.
他说话单调低沉。
词源mid 17th cent.: from modern Latin monotonus, from late Greek monotonos. - He spoke in a flat monotone.