built–in 
/ˈbɪltˈɪn/ adjective
always used before a noun /ˈbɪltˈɪn/ adjective 1 : included as a part of something
▪ His new watch has a built-in calculator. ▪ a camera with a built-in flash ▪ the car's built-in safety features ▪ a built-in bookshelf [=a bookshelf that is built as part of a wall] 2 : forming a natural part of someone or something
▪ All humans have a built-in ability to learn their native language. ▪ Living in warmer climates has many built-in [=(more formally) intrinsic, inherent] advantages. — see also build in/into at 1build
▪ His new watch has a built-in calculator. ▪ a camera with a built-in flash ▪ the car's built-in safety features ▪ a built-in bookshelf [=a bookshelf that is built as part of a wall]
▪ All humans have a built-in ability to learn their native language. ▪ Living in warmer climates has many built-in [=(more formally) intrinsic, inherent] advantages. — see also build in/into at 1build
