BANKROLL
bankroll, roll
(noun) a roll of currency notes (often taken as the resources of a person or business etc.); “he shot his roll on a bob-tailed nag”
bankroll
(verb) provide with sufficient funds; finance; “Who will bankroll the restoration of the former East German economy?”
Source: WordNet® 3.1
Etymology
Noun
bankroll (plural bankrolls)
A roll of banknotes or other paper currency, carried in lieu of a wallet.
The monetary assets of a person or organization.
Verb
bankroll (third-person singular simple present bankrolls, present participle bankrolling, simple past and past participle bankrolled)
(transitive) To fund a project; to underwrite something.
Synonyms: finance, support
Source: Wiktionary