FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

ptoeo πτοέω — pto-eh'-o — probably akin to the alternate of 4098 (through the idea of causing to fall) or to 4072 (through that of causing to fly away); to scare:--frighten.

see GREEK for 4098

see GREEK for 4072