[3, 4] brim hrosta Alfǫður ‘the surf of malt [ALE] of Alfaðir <= Óðinn> [POETRY]’: Hrosti ‘malt’ or strictly ‘mash’ is the malt and liquid used in brewing. The myth of the mead of poetry, and kennings alluding to it, are discussed in Frank 1981 and Davidson 1983, 418-47.