Luke 21:25-28

And there shall be signs in the sun, and in the moon, and in the stars; and upon the earth distress of nations, with perplexity;

Original: ἀπορία
Transliteration: aporia
Phonetic: ap-or-ee'-a
Thayer Definition:
the state of one who is in perplexity
Strong's Definition: From the same as G639 (ἀπορέω - aporeō - see following note); a (state of) quandary: - perplexity.

Original: ἀπορέω
Transliteration: aporeō
Phonetic: ap-or-eh'-o
Thayer Definition:
to be without resources, to be in straits, to be left wanting, to be embarrassed, to be in doubt, not to know which way to turn, to be at a loss with one's self, be in doubt, not to know how to decide or what to do, to be perplexed
Strong's Definition: to have no way out, that is, be at a loss (mentally): - (stand in) doubt, be perplexed.

the sea and the waves roaring; Men's hearts failing them for fear,

Original: ἀποψύχω
Transliteration: apopsuchō
Phonetic: ap-ops-oo'-kho
Thayer Definition:
to breathe out life, expire, to faint or swoon away
Strong's Definition: to breathe out, that is, faint: - hearts failing.

and for

Original: ἀπό
Transliteration: apo
Phonetic: apo'
Thayer Definition:
after verbs of motion from a place, of any kind of separation of one thing from another by which the union or fellowship of the two is destroyed, of a state of separation - that is of distance, physical, of distance of place, temporal, of distance of time, of origin, of the place whence anything is, comes, befalls, is taken, of origin of a cause
Strong's Definition: "off",that is, away (from something near), in various senses (of place, time, or relation; literally or figuratively): it usually denotes separation, departure, cessation, completion, reversal, etc

looking after

Original: προσδοκία
Transliteration: prosdokia
Phonetic: pros-dok-ee'-ah
Thayer Definition:
expectation (whether good or evil)
Strong's Definition: apprehension (of evil); by implication infliction anticipated: - expectation, looking after.

those things which are coming on

Original: ἐπέρχομαι
Transliteration: eperchomai
Phonetic: ep-er'-khom-ahee
Thayer Definition:
to come, to arrive, of time, come on, be at hand, be future, to come upon, overtake one, of sleep, of disease, of calamities, of the Holy Spirit, descending and operating in one, of an enemy attacking one
Strong's Definition: to supervene, that is, arrive, occur, impend, attack, (figuratively) influence: - come (in, upon).

the earth: for the powers

Original: δύναμις
Transliteration: dunamis
Phonetic: doo'-nam-is
Thayer Definition:
strength power, ability, inherent power, power residing in a thing by virtue of its nature, or which a person or thing exerts and puts forth, power for performing miracles, moral power and excellence of soul, power and resources arising from numbers, power consisting in or resting upon armies, forces, hosts
Strong's Definition: force (literally or figuratively); specifically miraculous power (usually by implication a miracle itself): - ability, abundance, meaning, might (-ily, -y deed), (worker of) miracle (-s), power, strength, violence, mighty (wonderful) work.

of heaven shall be shaken.  

Original: σαλεύω
Transliteration: saleuō
Phonetic: sal-yoo'-o
Thayer Definition:
a motion produced by winds, storms, waves, etc, to agitate or shake, to cause to totter, to shake thoroughly, of a measure filled by shaking its contents together, to shake down, overthrow, to cast down from one's (secure and happy) state, to move, agitate the mind, to disturb one.
Strong's Definition: to agitate, rock, topple or (by implication) destroy ; figuratively to disturb, incite: - move, shake (together), stir up.

{*note, see Isaiah 24:20 (esp 24:18-23) & Haggai 2:6}

And then shall they see the Son of man coming in a cloud with power and great glory.   And when these things begin to come to pass, then look up, and lift up your heads; for your redemption draweth nigh.
Luke 21:25‭-‬28 KJV