IPA: /kəˈlɒn.eɪd/
KK: /kəˈlɒn.eɪd/
Describing a structure that has a row or series of columns supporting a roof or a series of arches.
The ancient temple was beautifully colonnaded, creating a grand entrance.
Colonnaded → It is formed from "colonna" (from Latin *columna*, meaning a pillar or column) and the suffix "-ade" (indicating a state or condition). The word "colonnaded" refers to a structure that is characterized by having columns or pillars.
Picture a building that is defined by its 'columns' ('columna') — that's what makes it 'colonnaded'.
No commonly confused words.