canvas: [14] Canvas is related ultimately to hemp, for originally canvas was a cloth made from hemp. Latin cannabis (from the same source as English hemp) produced the Vulgar Latin derivative *cannapāceum, which passed into English via Old Northern French canevas. The verb canvass [16] appears to come from the noun: it originally meant ‘toss in a canvas sheet’, and this was perhaps the basis, via an intermediate ‘criticize roughly’, of the metaphorical sense ‘discuss thoroughly’. It is not clear where the political meaning ‘solicit votes’ came from. => cannabis, hemp[canvas etymology, canvas origin, 英语词源]