IPA: /ˈblɒk.i.ɪst/
KK: /ˈblɑːk.i.ɪst/
Having the most block-like shape or appearance; characterized by a solid, square, or rectangular form.
The blockiest building in the city stands out among the more modern designs.
Comparative: blockier
Superlative: blockiest
Blockiest → It is formed from "block" (from Old French *bloc*, meaning a solid piece of wood or a block) and the suffix "-iest" (meaning most). The word "blockiest" means the most block-like or having the most characteristics of a block.
Think of a solid piece of wood ('block') and remember that 'blockiest' means having the most qualities of a block.