abbr. sound intermediate frequency 
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florule, flory, FLOS, floscelle, floscular, Flosculariacea, Flosculariidae, floscule, flosculiferous, flosculous,
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siever, Sieversia, Sievert, sieving, sievingdepartment, SIF, sifaka, Sifbronze, SIFE, siff,