Of Latin origin; "custody", i.e. A Roman sentry -- watch.
Thayer's Greek Lexicon
Strong's 2892: κουστωδία
κουστωδία, κουστωδίας (Buttmann, 17 (16)), ἡ (a Latin word), guard: used of the Roman soldiers guarding the sepulchre of Christ, Matthew 27:65; Matthew 28:11. (Ev. Nic c. 13.)
Matthew 27:65 - N-AFS GRK:Πιλᾶτος Ἔχετε κουστωδίαν ὑπάγετε ἀσφαλίσασθε NAS: to them, You have a guard; go, KJV: Ye have a watch: go your way, INT: Pilate You have a guard Go make [it as] secure
Matthew 27:66 - N-GFS GRK:μετὰ τῆς κουστωδίας NAS: secure, and along with the guard they set a seal KJV: the stone, and setting a watch. INT: with the guard
Matthew 28:11 - N-GFS GRK:τινες τῆς κουστωδίας ἐλθόντες εἰς NAS: some of the guard came KJV: behold, some of the watch came into INT: some of the guard having gone into