The Collaborative International Dictionary
low-keyed
low-key \low-key\ low-keyed \low-keyed\adj. restrained in style or quality; not flashy or intense; understated; as, a little masterpiece of low-keyed eloquence.
Syn: subdued.
Wiktionary
low-keyed
a. relax, unstressful, not pressured.
WordNet
Usage examples of "low-keyed".
Before Cardona could ask Marcia about her zombi companions, the girl gave a low-keyed call.