Strong's 5083 (τηρέω)

hold fast, keep(- er), (pre-, re-)serve, watch

perhaps akin to G2334 (θεωρέω)); to guard (from loss or injury, properly, by keeping the eye upon; and thus differing from G5442 (φυλάσσω), which is properly to prevent escaping; and from G2892 (κουστωδία), which implies a fortress or full military lines of apparatus), i.e. to note (a prophecy; figuratively, to fulfil a command); by implication, to detain (in custody; figuratively, to maintain); by extension, to withhold (for personal ends; figuratively, to keep unmarried); by extension, to withhold (for personal ends; figuratively, to keep unmarried)

from (a watch;