all-seeing
Intensive adjective (فَعِيل pattern) from بَصُرَ (to see/perceive). Related: بَصَرٌ (sight/vision), بَصِيرَةٌ (insight). Can also mean 'insightful.'
Al-Baṣīr (The All-Seeing) means God sees all actions and intentions. This name provides both comfort (God sees our good deeds) and accountability (nothing is hidden).