Замерли

37 Они́ за́мерли в испу́ге,

37 [They, They Are] froze [at, in, of, on] [afraid, fear, fright, frightened, terror],

ду́мая,

thinking,

что ви́дят при́зрак.

[what, that, why] [see, they see] [ghost, spook].

But they were startled and frightened and thought they saw a spirit.
Luke 24:37 ESV

But they were terrified and affrighted,
and supposed that they had seen a spirit.
Luke 24:37 KJV

За́мерли ( Froze )