" multi-ply "

[Verb]  | "mul*ti*ply" | \ ˈməl-tə-ˌplī \

1: to increase in number especially greatly or in multiples : augment

2: to find the product of by multiplication

3: to use as a multiplicand in multiplication with another number

Origin: 13th century ;

 Middle English multiplien, from Anglo-French multiplier, from Latin multiplicare, from multiplic-, multiplex multiple;

[Verb]  | "cross multiply" 

1: to clear an equation of fractions when each side consists of a fraction with a single denominator by multiplying the numerator of each side by the denominator of the other side and equating the two products obtained

Origin: 1951 ;

[Adverb]  | "mul*ti*ply" | \ ˈməl-tə-plē \

1: in a multiple manner : in several ways

Origin: 1881 ;

[Adjective]  | "mul*ti-ply" | \ ˌməl-tē-ˈplī \

1: composed of several plies

Origin: 1926 ;

[Verb]  | "multiply"