thereabout

From Middle English ther-aboute, ther-abouten (“of a place or an object: around there, in its vicinity; surrounding it; nearby, neighbouring; here and there, throughout that place; of an action, matter, etc.: about, concerning; of an amount or distance: approximately, more or less; of time: about then, around that time”) [and other forms], from Old English þǣrābūtan, þǣronbūtan, from þǣr (“there”) (ultimately from Proto-Indo-European *só (“this; that”) + *-r) + abūtan, onbūtan (“about; round about; on; on the outside”) (from on- (prefix meaning ‘on; upon; there; thither; to’) (ultimately from Proto-Indo-European *h₂en- (“on; onto”)) + būtan (“just, merely, only”) (ultimately from Proto-Indo-European *h₁ep- + *úd (“away; out; outwards; upwards”))). The English word is analysable as there + about.

The word is attested earlier than thereabouts.