IPA: /ˈtɪrˌsteɪn/
KK: /tɛrsteɪn/
A mark or line that is left on a surface when tears fall and dry.
She noticed a tearstain on her pillow after crying last night.
Tearstain → It is formed from "tear" (from Old English *tēar*, meaning a drop of clear salty liquid produced by the eyes) and "stain" (from Old French *esteindre*, meaning to extinguish or to mark). The word "tearstain" refers to a mark left by tears, indicating the presence of crying.
Think of a 'tear' as a drop from your eyes and 'stain' as a mark left behind. This helps you remember that 'tearstain' means a mark made by tears.