to produce low, soft musical tones with the voicecroon a lullabya singer crooning onstage
croon a lullaby
a singer crooning onstage
belt, harmonize, hum, lilt, quaver, scat, sharp, slur, trill, troll, warble, yodelcarol, chant, descant, sing, vocalizeserenade
in the 15th century
英语同义词词典收录了63618条英语词条，基本涵盖了全部常用同义词或反义词的辨析及翻译，是英语学习的有利工具。