What this suffix does
-rooted forms compound adjectives that describe the depth and stability with which something is embedded — in soil, in a person, in a culture, in a system. Deep-rooted, well-rooted, firmly-rooted, shallow-rooted — each compound measures the degree of embedding. In figurative use these are among the most important compounds in political and social journalism: a "deep-rooted" prejudice, a "well-rooted" tradition, a "shallow-rooted" reform. The root metaphor is powerful because it speaks to what can and cannot easily be changed: deep roots resist removal; shallow roots do not.