TBESG:εὐκαιρίαopportunityG:N-F εὐκαιρία, -ας, ἡ (< εὔκαιρος), [in LXX: Psa.9:10 (see Soph., Lex., see word) Refs Psa.10:1 145:15 (עֵת), Refs Sir.38:24, 1Ma.11:42 * ;] fitting time, opportunity: before ἵνα, Mat.26:16; τοῦ, with inf., Luk.22:6.† (AS)
εὔκαιρος eukairos yoo'-kahee-ros From G2095 and G2540; well timed, that is, opportuneKJV Usage: convenient, in time of need.
εὐκαιρέω eukaireō yoo-kahee-reh'-o From G2121; to have good time, that is, opportunity or leisureKJV Usage: have leisure (convenient time), spend time.