מָרָה
From LSJ
μέγα γὰρ τὸ τῆς θαλάσσης κράτος → great is the power of the country that controls the sea, control of the sea is a great thing, the dominion of the sea is a great matter, the rule of the sea is a great matter, the rule of the sea is indeed a great matter, control of the sea is a paramount advantage
English (Strong)
a primitive root; to be (causatively, make) bitter (or unpleasant); (figuratively) to rebel (or resist; causatively, to provoke): bitter, change, be disobedient, disobey, grievously, provocation, provoke(-ing), (be) rebel (against, -lious).
the same as מָר feminine; bitter; Marah, a place in the Desert: Marah.