In what way or manner; by what means; used to ask about the condition or quality of something.
Variation, still used today in the 21st century. Clearly, it has been used for a very long time; it was seen signing by George Veditz in his 1913 film, "The Preservation of American Sign Language".
Gloss: you come-to class how?
English equivalent: How do/did you come to class?
In si5s writing system.