провалились

failed, fell through

p r ə v ɐ lʲ i lʲ ɪ sʲ → провалиться

про through, completely, or away + вал to knock down, fell + и verb-forming + л Past tense + и Plural + сь reflexive marker

verb · plural · past indicative Rare #47,024

failed Often used about exams, plans, or performances that did not succeed.

RU: Мы провалились на экзамене.

EN: We failed the exam.

fell through Used when something/someone falls into a hole or through a surface (for example, through ice).

RU: Они провалились под лёд.

EN: They fell through the ice.

Conjugation of провалиться

Indicative past

Peace talks have failed again.

All our attempts failed.

Or did they all fail?

— Андрей Рублёв (1966)

All attempts to save Tom failed.