1: ῥήσσω
(Strong's #4486 — Verb — rhegnumi — hrayg'-noo-mee, hrace'-so )

see BREAK , A. No. 6.

2: λάσκω
(Strong's #2997 — Verb — lakeo | lasko — las'-kho )

primarily, "to crack, or crash," denotes "to burst asunder with a crack, crack open" (always of making a noise), is used in Acts 1:18 .