🧱⚪

#solid wall #filled in #no passage #complete barrier #sealed opening #unbroken surface

🧱⬛🧱

#solid wall #no opening #windowless wall #no view #filled in

🧱🧱🧱🌊

#solid wall #sea defence #wave barrier #coastal engineering #embankment #dyke

🧱🚫🪟

#no windows #windowless wall #solid wall #blank wall #featureless wall

💎🛡️🧱

#diamond hard #impenetrable shield #solid wall #unbreakable material #durable #high defense #material strength #mineral hardness