structurally
Structurally (adverb) means In terms of how something is built or organized, rather than in appearance or content. Example: “The bridge looked fine, but it was structurally unsound.”
How to use structurally
Learner’s notesIn plain EnglishRelating to the underlying framework or organization of something, not its surface features.
Fill the gap
Can you complete this real example?
The bridge looked fine, but it was _____ unsound.
Etymology
From structural + the adverb-forming suffix -ly.