From G5401; to {frighten} that {is} (passively) to be alarmed; by analogy to be in awe {of} that {is} revere: - be (+ sore) {afraid} fear ({exceedingly}) reverence.
From a primary φέβομαι phebomai (to be put in fear); alarm or fright: - be {afraid} + {exceedingly} {fear} terror.
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Matrix
Luk 21:11And great earthquakes shall be in divers places, and famines, and pestilences; and fearful sightsG5400 and great signs shall there be from heaven.