1) Etch 1) Fix deeply 2) Fix indelibly 3) French word used in English 4) Imbue with a wood finish 
• (v. t.) To incorporate with the grain or texture of anything; to infuse deeply. See Ingrain. • (v. t.) To color in imitation of the grain of wood; to grain. See Grain, v. t., 1. • (v. t.) To dye in grain, or of a fast color. See Ingrain.
1. To dye in grain, or of a fast colour. See Ingrain. 'Leaves engrained in lusty green.' (Spenser) ... 2. To incorporate with the grain or texture of anything; to infuse deeply. See Ingrain. 'The stain hath become engrained by time.' (Sir W. Scott) ... 3. To colour in imitation of the grain of wood; to grain. See Grain. ... Origin: Pref. En- + grai...
En·grain' transitive verb [ imperfect & past participle Engrained ; present participle & verbal noun Engraining .] [ Prefix en- + grain . Confer Ingrain .] 1. To dye in grain, or of a fast color. See In...
ingrain (defs. 1, 2).