痕 - mark, foot print

bloodstain

trace; vestige; mark; sign; evidence

scar; cicatrix

scar contracture; cicatricial contraction

scar (e.g. from operation, injection); trace; mark (e.g. skid marks)

skid mark; tire mark; tyre mark

fingernail mark; scratch

tracer bullet; tracer shell

bullet hole; bullet mark

linear mark; abrasion; scratch; streak

trace fossil

trace fossil