Katénanti (κατέναντι) means opposite, over against, in front of, in the presence of. A strengthened form of enanti. It appears in both geographical and theological contexts.
The most theologically weighty use is Romans 4:17: Abraham had faith 'katénanti God' — in His very presence, before His face. This intensifies Abraham's faith: it was not theoretical belief but faith exercised in direct relationship with the God who sees all. God's omniscience means faith is never private — always before His face. This appears also in 2 Corinthians 2:17: 'in Christ we speak before God with sincerity.'