(idiomatic) a desire for, or interest in, the success of a particular person or group, often a sports team

present participle of root out

plural of rooting interest

Alternative form of rootin' tootin'.

(idiomatic) People and society at the local (most basic) level rather than at the national centre of political activity / The essential foundation or source of something

(transitive) The action of identifying the cause of a chain of events which leads to an outcome or effect of interest. To root cause something's root cause does not necessarily imply the use of root cause analysis (RCA).

(idiomatic) An initiating cause of a chain of events which leads to an outcome or effect of interest.

(mathematics) A function which, when applied a given number of times, equals another given function.

(intransitive, literally) To grow roots into soil. / (intransitive, figuratively) To become established, to take hold.

(idiomatic, chiefly US) Alternative form of root about