Latin word disciplina comes from Latin discere, and later Latin discipulus (Student, pupil, disciple.)

Detailed word origin of disciplina

Dictionary entry	Language	Definition
discere	Latin (lat)
discipulus	Latin (lat)	Student, pupil, disciple.
discipulina	Latin (lat)
disciplina	Latin (lat)	Discipline, science, study. Method. Teaching, instruction, education. Training.