Basic meaning: symbol (qiān)
Write your name or draw a symbol in person: signature. Sign. Sign in. problem Sign for it Sign. Sign. Sign.
Write a brief opinion: endorsement. Sign it. Visa.
A thin stick or sheet made of bamboo and wood: a toothpick.
Something marked on a piece of paper or other objects in a book: a bookmark. Label.
Give it a rough stitch.
A slender bamboo piece or stick used for divination or gambling: a lottery ticket. Ask for a visa