Words

Arabic
btr - to cut off (Lane 149)
Arabic
ˀabtar- - having no progeny, offspring; having the tail cut off (Lane 149)
Arabic
btt - to cut (Lane 147)
Arabic
baṯan- - snake (BK 1 85)
Arabic
bṭˀ - to be slow (Lane 215)
Arabic
bṭḥ - to spread, to expand, to extend; to throw somebody down upon his face; VII. to lie, to stretch oneself (Lane 216)

May be remotely related.

Arabic
bṭl - to be false, untrue, wrong (Lane 219)
Arabic
buṭm- - terebinth (Lane 219)
Arabic
baṭn- - belly (BK 1 138, Lane 219)
cf. bṭn ‘avoir le ventre large, détendu’ [ibid. 137].
Arabic
b1ˀrat- - a hole dug in the ground in which to cook; a place in which fire is lighted (Lane 145)