1. tasteless
Did you see that couple in matching outfits just now? How tasteless!
The last time I ate in that restaurant the food was completely tasteless. I think they must have forgotten to season it.
I think I’ll add some salt because the sauce is a bit tasteless.
tasteless soup
I'm afraid it's tasteless.
That outfit is really tasteless.
Foreign rice is hard and tasteless, and doesn't appeal to the Japanese palate.