till: English has three distinct words till, but two of them are probably related. The etymological notion underlying till ‘cultivate the soil’ [OE] is of ‘striving to obtain a goal’. Indeed, that is what its Old English ancestor tilian originally meant; ‘cultivate’ is a late Old English development, via an intermediate ‘labour’. The verb comes from a prehistoric Germanic *tilōjan, a derivative of the noun *tilam ‘aim, purpose’ (source of German ziel ‘goal’).
This passed into Old English as till ‘fixed point’, which seems to have been converted into a preposition meaning ‘up to a particular point (originally in space, but soon also in time)’. The compound until dates from the 13th century; its first element was borrowed from Old Norse *und ‘till’. The origins of till ‘money box’ [15] are uncertain. [till etymology, till origin, 英语词源]