Which term suggests a return to a previous speed or tempo?

The term that suggests a return to a previous speed or tempo is "Da Capo." This Italian phrase translates to "from the head," indicating that the performer should return to the beginning of the piece or section. In practical terms, "Da Capo" often implies that the music should be played again, generally leading back to an earlier tempo or character that was set at the beginning of the piece.

In many musical compositions, particularly in the classical style, a "Da Capo" will often follow a contrasting section and lead back to the same material with its original tempo intact, thereby reinstating the musical mood and tempo established at the start.

The other terms present different meanings: "Ritardando" refers to a gradual slowing down of the tempo, while "Fine" indicates the end of a piece. "Repeat" typically signifies that a certain section is to be performed again, but without the connotation of returning to a previously established tempo specifically.