A glance or quick look; a glimpse of something.
From Middle Dutch 'blick' meaning gleam or glance, related to German 'Blick' (look or glance) and possibly to Old English 'blican' (to gleam).
This lovely Dutch-rooted word still survives in some English dialects and Yiddish—it's the perfect word for that quick sideways glance you give when you're trying not to be noticed.
Complete word intelligence in one call. Free tier — 50 lookups/day.