noun which may take the genitive case particle 'no'
tasteless and odorless; bland
Describes something that has neither taste nor smell, often used for chemicals, water, or very plain food.
この薬は無味無臭なので、飲みやすい。
This medicine is tasteless and odorless, so it's easy to take.
無味無臭のガスは検知が難しい。
Tasteless and odorless gases are hard to detect.
Means 'odorless' only, without the 'tasteless' component.
Compound of 無味 (tasteless) and 無臭 (odorless). The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning.