Bioō (βιόω) means to live — specifically to spend one's life, to pass one's time on earth. It is related to bios (life as lived experience). The word appears once in the New Testament, in 1 Peter 4:2, where believers are exhorted to spend the rest of their earthly lives living for the will of God rather than for human desires.
Bioō in 1 Peter 4:2 frames the whole Christian life as a deliberate choice of how to spend the days God has given. Peter's context is striking: Christians share in the sufferings of Christ (4:1) so that they might live the rest of their earthly time not for human passions but for God's will. The word implies intentionality — life is not simply lived, it is spent. Like a finite currency, each day is expended on something. Paul echoes this: "Be very careful, then, how you live — not as unwise but as wise, making the most of every opportunity" (Ephesians 5:15–16).