Empty
Empty adjective - Lacking contents that could or should be present.
Unobstructed and empty are semantically related. In some cases you can use "Unobstructed" instead an adjective "Empty".
Unobstructed
Unobstructed adjective - Allowing passage without obstruction.
Usage example: only one road remained unobstructed after the storm
Empty and unobstructed are semantically related. Sometimes you can use "Empty" instead an adjective "Unobstructed".
Mutual synonyms
Both words in one sentence
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A variation of this trope does not involve physical objects going into the ear, but rather a POV shot of a character's ear showing an unobstructed view through their empty head and out the opposite ear.
Source: In One Ear, Out the Other
Cite this Source
Unobstructed and Empty. (2016). Retrieved 2026, July 31, from https://thesaurus.plus/related/empty/unobstructed
Empty & Unobstructed. N.p., 2016. Web. 31 Jul. 2026. <https://thesaurus.plus/related/empty/unobstructed>.
Unobstructed or Empty. 2016. Accessed July 31, 2026. https://thesaurus.plus/related/empty/unobstructed.
Google Ngram Viewer shows how "empty" and "unobstructed" have occurred on timeline