Thou compassest
zarah (zaw-raw')
to toss about; by implication, to diffuse, winnow -- cast away, compass, disperse, fan, scatter (away), spread, strew, winnow.
my path
'orach (o'-rakh)
a well-trodden road; also a caravan -- manner, path, race, rank, traveller, troop, (by-, high-)way.
and my lying down
reba` (reh'-bah)
prostration (for sleep) -- lying down.
and art acquainted
cakan (saw-kan')
to be familiar with; by implication, to minister to, be serviceable to, be customary
with all my ways
derek (deh'-rek)
a road (as trodden); figuratively, a course of life or mode of action, often adverb