The word "underhabit" refers to a place that is below ground level or beneath the surface of the earth. Its IPA phonetic transcription is /ˈʌndərˌhæbɪt/. The word is spelled "under" with the letter "h" followed by "habit" which is spelled with the letter "a." The "h" in "under" represents the sound /h/ and the "a" in "habit" represents the sound /æ/. The word "underhabit" is commonly used in geology to describe the location of rocks and minerals found beneath the surface.