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Otro diccionario
Consulte también:

somnolent
son
song
song and dance

sometimes  
at times, every now and then, every so often, from time to time, now and again, now and then, occasionally, off and on, once in a while, on occasion 
 
Antonyms  
 always, consistently, constantly, continually, eternally, ever, everlastingly, evermore, forever, invariably, perpetually, unceasingly, without exception