quadruple
/kwɑˈdɹu.pəl/ verb C2- To multiply by four. · Quadrupling four gives sixteen.
- To increase by a factor of four. · Our profits quadrupled when we made the improvements.
- To provide four parallel running lines on a given stretch of railway.
He/she/it quadruples · Past quadrupled · Past participle quadrupled · -ing form quadrupling
Verb forms
- Base form
- quadruple
- He/she/it
- quadruples
- Past
- quadrupled
- Past participle
- quadrupled
- -ing form
- quadrupling
From the library
During the war with Spain he was employed in the commissariat of the French army, and made a fortune; then with that money he speculated in the funds, and trebled or quadrupled his capital; and, having first married his banker’s daughter, who left him a widower, he has married a second time, a widow, a Madame de Nargonne, daughter of M.
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