bestiality

n 1 [U] (a) quality of being bestial 兽性; 兽行: an act of horrifying bestiality 可怕的兽行. (b) sexual activity between a human and an animal 兽奸（人兽之间的性行为）. 2 [C] brutal act, esp of a sexually perverted kind 兽性的行为; （尤指）性变态.

beside the question, besides, besiege, besmear, besmirch, besotted, besought, bespangled, bespattered, bespeak, bespectacled, bespoke, best, best man, best of all, best seller, best-loved, best-seller, best-selling, bestial, bestially, bestiary, bestir, bestow, bestowal, bestride, bet, bet on, beta, bete noire, betel, betel-nut, betide, betoken, betray, betrayal, betrayer, betroth, betrothal, betrothed,