The spelling of the word "guarled" can be explained through its IPA transcription. The first syllable "gu" represents the sound /ɡ/, as in "go". The second syllable "ar" is pronounced /ɑr/ as in "car". The final consonant cluster "-led" is pronounced as /ld/, with the sound of "l" and "d" blended together. Therefore, "guarled" is spelled as it is to represent the phonetic sounds in its pronunciation. It means twisted or contorted.
There doesn't seem to be a word "guarled" in the English language. It is likely a misspelling or a variant of another word. If you meant "gnarled", the etymology of that word is as follows:
The word "gnarled" is derived from the Old English word "gnarule", which meant "knotted" or "twisted". It can be traced back to the Proto-Germanic word "gnarwalaz", meaning "twisted" or "ugly". The root word "gnar" refers to something that is contorted, twisted, or deformed, representing the physical appearance of a knotty or twisted piece of wood. Initially, the term was mainly used to describe the appearance of trees, particularly their rough and twisted branches.