What does Boxing Day have to do with boxing?
1560s, "to cause to multiply," from Latin propagatus, past participle of propagare "to set forward, extend, procreate" (see propagation). Intransitive sense "reproduce one's kind" is from c.1600. Related: Propagated; propagating.
propagative prop·a·ga·tive (prŏp'ə-gā'tĭv)
Of, relating to, or involved in propagation.
Relating to the germ cells of an animal or a plant as distinguished from the somatic cells.
propagate prop·a·gate (prŏp'ə-gāt')
v. prop·a·gat·ed, prop·a·gat·ing, prop·a·gates
To cause an organism to multiply or breed.
To breed offspring.
To transmit characteristics from one generation to another.
To cause to move in some direction or through a medium, such as a wave or a nerve impulse.