ʿadhb
عَذْب
fresh, not salty (of water); sweet, pleasant (of a voice or words)
يصب النهر ماءه العذب في البحر المالح.
The river pours its fresh water into the salt sea.
ألقى الشاعر قصيدته بصوت عذب هادئ.
The poet recited his poem in a sweet, calm voice.