When you first learn a new skill or begin a new hobbys you may be called

i don't have enough information to answer with a sure choice but these are the two answers that could answer your question:

impossible to solve.

incapable of being dissolved.

hope this ! =^-^=

harlem's  cotton club boasted the talents of duke ellington. singers such as bessie smith and billie holiday popularized blues and jazz vocals. jelly roll morton and louis armstrong drew huge audiences as white americans as well as african americans caught jazz fever.