From jak + melk. Hyphenation: jak‧melk <span class="searchmatch">jakmelk</span> f (uncountable) yak's milk...
jakje n) yak, the ox-like Himalayan bovine, Bos grunniens (produce) jakboter, <span class="searchmatch">jakmelk</span> From Middle Dutch jak, borrowed from Old French jaque (“medieval doublet”)...