Wiktionary
root for
vb. (context intransitive English) To encourage a favored person, team, or result.
Usage examples of "root for".
Parkinson says that if ivory is boiled with Mandrake root for six hours, the ivory will become so soft 'that it will take what form or impression you will give it.
She fastened her measuring cord at that point, then climbed down as she checked each arm-length of the root for imperfections.
She kept checking the boiling water with the root for the right color and flavor, impatient for it to be done.
Natural plant growth substances such as auxins, cytokinins, and gibberellins are certainly responsible for the control of root initiation and the rate of root for- mation.