The spelling of the word "salh" may seem unusual, but it actually has a phonetic explanation. In IPA phonetic transcription, "salh" is spelled as /sæl/ which means it has the same vowel sound as "cat". The "h" at the end is silent, but it can change the pronunciation of the "l" which becomes strengthened or aspirated. This word may not be a common English word, but understanding its spelling can help in deciphering other challenging word spellings in the future.
The word "salh" is of Old English origin. It comes from the Proto-Germanic word *salą, which means "building" or "room". This word evolved into the Old English term "sealh", which specifically referred to a hall or a large building. Over time, the spelling gradually changed to "salh" before eventually becoming the modern English word "hall".