The word "meshier" is spelled with the combination of the letters "sh" and "i" which correspond to the sound /ʃ/ as in "shoe" or "sheep". The letter "y" represents the sound /iː/ as in "key" or "preachy". The final letters "er" indicate the comparative form of an adjective, meaning "more meshy". The correct pronunciation of "meshier" would be /ˈmɛʃiər/ in IPA phonetic transcription.
The word "meshier" is not listed in major English dictionaries, and thus does not have an established etymology. It could potentially be a comparative form of the adjective "meshy", which means resembling or having meshes or openings. However, it is important to note that if "meshier" is a neologism or a lesser-known term, its etymology would not be widely documented or recognized.