"cantar con voz suave" in English

song- poem

to cough- to cough up- to give- to sing- to grass- to lilt- to rat- to sing out- to warble- to perform- to perform- to chant- to sing of- to squeal- to hum- to spill the beans- to call- to give away- to extol the virtues of- to tell- to chirp- to chirrup- to declare- to crow- to talk- to stink

with

voice- tones- rumor- rumour- shouting- shouts- word

smooth operator

gentle- mild- smooth- soft- bland- delicate- downy- mellow- gingerly- light- silken- supple- weak- pale- light- slight- good-looking