Not irritating, strident, or loud
Not showy or obtrusive
The beast inside her was subdued, waiting.
The child was shy, but seemed excited in a subdued way by the new surroundings.
She sounded subdued and whispered as she asked how Molly was doing.
He was subdued by King Louis VI.
As a rule the mountain slopes are well graded and subdued, but a few are steep and some are rocky and precipitous.