Learn Farsi: بزرگ‌ترین تعاون ما در این تقاطع بود. - Our greatest cooperation was at this intersection.

It follows the ta-C1-â-C2-o-C3 pattern, which usually indicates mutual action or reciprocity. The three root letters are ع-و-ن (A-W-N), which relate to giving help or aid. Put together, 'mutual help' gives us the meaning 'cooperation'.

Is the word تقاطع (taqâto') in this sentence also an example of this same pattern?

Yes! It uses the exact same structure. Its root letters are ق-ط-ع (Q-T-A), which mean to 'cut'. Therefore, تقاطع literally describes a place where two roads or lines 'mutually cut' across each other, which perfectly describes an intersection.

Why isn't there an Ezafe (the connecting 'e' sound) between بزرگ‌ترین (bozorg-tarin) and تعاون (ta'âvon)?

Superlative adjectives ending in -tarin (meaning 'the most' or '-est') are placed directly before the noun they modify without using an Ezafe. However, notice that there is a spoken Ezafe connecting the noun to the pronoun right after it: ta'âvon-e mâ (our cooperation).

Can در (dar) translate to 'at' as well as 'in'?

Yes. While English makes a strict distinction between being 'in' a container or city and 'at' a specific point like an intersection, Farsi uses در (dar) broadly for both general containment and specific locations.