trace (verbe)
Sens 1 : to follow or to discover someone or something by finding and noticing marks,
tracks or other evidence. [source : D'après OAL]
--------------------------------------------------
--------------------------------------------------
Sens 1 : a visible mark, such as a footprint, made or left by the passage of a person, animal, or thing. [source : AHD]
--------------------------------------------------
Sens 2 : a mark or impression left on the face, the mind, etc. [source : OED]
--------------------------------------------------
Sens 3 : an evidence or an indication of the former presence or existence of something; a vestige. [source : D'après AHD]
--------------------------------------------------
Sens 4 : an extremely small amount or barely perceivable indication. [source : AHD]