treble - noun

the pitch range of the highest female voice

treble - verb

• sing treble
• increase threefold

treble - adjective

• having or denoting a high range
• three times as great or many
• having three units or components or elements
• having more than one decidedly dissimilar aspects or qualities

treble - thesaurus

double   dual   soprano   ternary   threefold   triple   triplex   twofold