• 人(person; human (pictographic))

A person holding a tool means "to use" or "to take" in order to work.

• 糹(thread of silk; silk strand)
• 致(reach; refined)

A thread woven to its finest and most delicate level becomes sophisticated silk fabric.

• 于(at; in (pictographic — curved stroke representing breath escaping))

Breath curves and escapes from a person, meaning 'at' or 'in' a place.

• 人(person; human (pictographic))

A person holding a tool means "to use" or "to take" in order to work.

• 糹(thread of silk; silk strand)
• 致(reach; refined)

A thread woven to its finest and most delicate level becomes sophisticated silk fabric.

• 于(at; in (pictographic — curved stroke representing breath escaping))

Breath curves and escapes from a person, meaning 'at' or 'in' a place.