To guarantee the quality or character of; assure; justify.
A judicial writ authorizing arrest, search, seizure, etc.
A voucher; guaranty; sanction.
Warrantable.
Show us your warrant! – Dorothy Dale by Margaret Penrose
I'll warrant he did! – Helmet of Navarre by Bertha Runkle
Their acquaintance was in too early a stage to warrant her in bringing in Dick's name. – Not Like Other Girls by Rosa N. Carey