The spelling of the phrase "wert trail of" is a bit unusual and may perplex those unfamiliar with it. The correct pronunciation of "wert" is /wərt/, with the IPA phonetic transcription being "wuhrt." In this context, "trail of" simply means the path or track left behind by someone or something. Therefore, "wert trail of" refers to the trace or sign of something that has passed through a particular area, like a footstep or tire mark.