tasteless
Concise Oxford English Dictionary © 2008 Oxford University Press:
tasteless/ˈteɪstləs/
▶adjective
- 1 lacking flavour.
- 2 lacking in aesthetic judgement or constituting inappropriate behaviour.
– derivatives
tastelessly adverb,
tastelessness noun.
tastelessly adverb,
tastelessness noun.
'tasteless' also found in these Oxford entries:

