Bland

blass

(mild; soft; gentle; smooth in manner; suave)

fad

(lacking in taste or flavor)

geistlos

((fig.) lacking interest; boring; dull)

gelassen

(mild; soft; gentle; smooth in manner; suave)

geschmacklos

(lacking in taste or flavor)

hohl

((fig.) lacking interest; boring; dull)

langweilig

(lacking in taste or flavor)

mild

(having a soothing effect; not irritating or stimulating)

platt

((fig.) lacking interest; boring; dull)

reizlos (med.)

(having a soothing effect; not irritating or stimulating)

sanft

(having a soothing effect; not irritating or stimulating)

sanftmütig

(mild; soft; gentle; smooth in manner; suave)

stumpfsinnig

((fig.) lacking interest; boring; dull)