English to Spanish Other Music Music analysis

String Quartet No. 8, op. 110 - Movement I (bars 1-55) by D Shostakovich.

Structure:
[...]
Bar 23: harmonised version of the DSCH motive involving the following chords: C minor - dominant, Eb minor chord F minor chord and dominant; the dominant chord at bar 25 is embellished with a b9-8 suspension - Ab-G over the G in the violin II. This harmonisation of the DSCH motive resolves onto the tonic in C minor - simple ***bare 5th***: C and G.
[...]
Bar 46: DSCH motive presented in the cello, resolving at bar 50 with ***open 5th***: C and G, with violing I and violin II imitating one another with the C-G-G-Ab-G pattern.


I think "open 5th" and "bare 5th" both refer to the same concept. How would you translate it?