From H4843; {bitterness} that {is} (figuratively) trouble: - grief.
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Exo 15:23¶ And when they came to MarahH4785, they could not drink of the waters of MarahH4785, for they were bitter: therefore the name of it was called MarahH4785. ▼
Num 33:8And they departed from before Pi-hahiroth, and passed through the midst of the sea into the wilderness, and went three days' journey in the wilderness of Etham, and pitched in MarahH4785.
Num 33:9And they removed from MarahH4785, and came unto Elim: and in Elim were twelve fountains of water, and threescore and ten palm trees; and they pitched there.