means To walk a long way, usually through countryside or up rough terrain, on foot and for pleasure or purpose; also, a sharp upward jump in a price or amount.

from An English verb that surfaced in the early 1800s, first as a dialect word meaning to walk or tramp vigorously — its deeper roots are genuinely murky. It may be a variant of the older 'hyke,' linked to the idea of swinging or hitching something up, which neatly explains the other sense of 'hike': to raise or jerk upward, as when you hike up your trousers or a landlord hikes the rent.