Fromdes- +‎aba +‎-ar.

• Hyphenation:de‧sa‧bar

desabar (first-person singular presentdesabo,first-person singular preteritedesabei,past participledesabado)

1. (intransitive) tocollapse
   • 1865,José de Alencar, “XXV”, inAs Minas de Prata:

     Ouviu-se então um grande estrondo; o teto da casadesabou todo, e de um só jacto, sepultando sob suas ruínas os sobejos do edifício.

     (pleaseadd an English translation of this quotation)

2. (intransitive, figuratively) tofall through
3. (transitive) totopple, toknock down

• Portuguese terms prefixed with des-
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