respaldo
/resˈpaldo/ · B2 · noun · m
support
💺 re-spaldo: spalda (back, Slavic-like) — sounds like 'rest-pal-do': a pal for your back
Respaldo comes from re- + espalda (back): something at your back. Sounds like 'rest-pal-do': a rest-pal that backs you. That covers a chair's backrest, moral support, and a data backup you can fall back on.