4 Pics 1 Word Puzzles

What is the 1 word (6 letters) answer to the puzzle below? Scroll down to see the answer!

4 Pics 1 Word Answer 6 letters for zipper half open undone, man tightening belt on pants, stewardess helping child on airplane, woman buckling seatbelt in car

Zipper, Belt, Airplane, Buckle

The Answer is:

FASTEN
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