This verb means to lack opportunity, be without occasion, or have no favorable moment for action. Classical usage opposed it to "having opportunity" (eukaireo), denoting the absence of suitable conditions. Paul uses it in Philippians 4:10 acknowledging the Philippians' gift: "you lacked opportunity" to help earlier. The imperfect middle tense suggests ongoing lack of occasion—not that they lacked concern but that circumstances prevented them from acting on their care. Paul graciously excuses the delay, attributing it to lack of opportunity rather than lack of love, showing pastoral sensitivity to their limitations.