Abarim Publications' online Biblical Greek Dictionary
The cardinal number τρεις (treis, meaning three — the neutral form is the more familiar τρια (tria) — occurs 66 times in the New Testament: see full concordance. It's also part of the following derivations and compound words:
- Postfixed with the decimal termination -konta: the cardinal number τριακοντα (triakonta), meaning thirty. This word is used 11 times; see full concordance.
- Together with the cardinal εκατον (hekaton), meaning hundred: the cardinal τριακοσιοι (triakosioi), meaning three hundred (Mark 14:5 and John 12:5 only).
- Together with the noun βολις (bolis), meaning dart or plunger: the adjective (or noun) τριβολος (tribolos), meaning three-pronged (Matthew 7:16 and Hebrews 6:8 only). In the New Testament, this word appears to be applied only to naturally occurring three-pronged plants, but note that this term also denoted a kind of prickly military device that would ambush and cripple horses.
- Together with the noun ετος (etos), meaning year: the noun τριετια (trietia), meaning three years (Acts 20:31 only).
- Together with the noun μην (men), meaning month: the adjective τριμηνον (trimenon), meaning a three-month period (Hebrews 11:23 only).
- The adverb τρις (tris), meaning thrice or three times. This word occurs 12 times, see full concordance, and from it comes:
- Together with the noun στεγη (stege), meaning roof: the adjective τριστεγον (tristegon), meaning three-roofed, which is what we would call a three-floored [building]: a building with three stories. Used as substantive, this word denotes the third level of a house (Acts 20:9 only).
- The ordinal number τριτος (tritos), meaning third or thirdly. This number is mentioned 58 times; see full concordance.