bark
n.
1
"tree skin," c.1300, from a Scandinavian source akin to Old Norse borkr "bark," from Proto-Germanic *barkuz, which probably is related to birch and Low German borke. The native word was rind.
2
"any small ship," early 15c., from Middle French barque (15c.), from Late Latin barca (c.400 C.E.), probably cognate with Vulgar Latin *barica (see barge). More precise sense of "three-masted ship" (17c.) often is spelled barque to distinguish it.
3
dog sound, Old English beorc, from bark, v.. Paired and compared with bite (n.) since at least 1660s; the proverb is older: "Timid dogs bark worse than they bite" was in Latin (Canis timidus vehementius latrat quam mordet, Quintius Curtius).
v.
in reference to a dog sound, Old English beorcan "to bark," from Proto-Germanic *berkan (cognates: Old Norse berkja "to bark"), of echoic origin. Related: Barked; barking. To bark up the wrong tree is U.S. colloquial, first attested 1832, from notion of hounds following the wrong scent.