The spelling of the word "h saw" can be a bit confusing without context. However, if we use IPA phonetic transcription, we can understand how the word is spelled. The first sound is represented by the voiceless glottal fricative symbol /h/. Next, we have the vowel sound /ɔ/, which is pronounced like the "aw" sound in "saw." Finally, we have the consonant sound /s/, which is pronounced as a voiceless alveolar sibilant. Therefore, "h saw" is spelled as it sounds: /h sɔ/.
The term "h saw" does not have an established etymology as it seems to be a combination of the letter "h" and the word "saw" without any specific meaning or linguistic origin. It is possible that it could be a typographical error or a misinterpretation of another word or phrase.