supplementare
supplementary
adjective soop-pleh-men-TAH-reh Rare
Origin: Latin supplementum (that which fills up)
Also means
extra
Usage Note
Supplementare is invariable for gender (un'ora supplementare, un costo supplementare). In football, tempi supplementari are extra time (overtime). It is a formal synonym of aggiuntivo (additional); in everyday speech extra or in più are more common.
Examples
"La partita è andata ai tempi supplementari."
Natural Translation
The match went to extra time.

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