IPA: /ˌɑːrkɪˈtɛkʧərəl/
KK: /ˌɑːrkɪˈtɛkʧərəl/
Related to the design and style of buildings and other structures.
The architectural design of the museum is both modern and functional.
Architectural → It is formed from "archi-" (from Greek "architekton", meaning chief or master builder) and "tectura" (from Latin "tectura", meaning structure or building). The word "architectural" refers to anything related to the art and science of designing buildings and structures.
Think of a 'master builder' ('archi-') who designs 'structures' ('tectura') — that's why architectural relates to the design of buildings.