demurrage

1640s, from Old French demorage, from demorer (English demur),^[1] from Latin dēmorārī (“to tarry”).

By surface analysis, demur (“delay”) +‎ -age, with doubled ‘r’ to clarify pronunciation and avoid ambiguity with demure.

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demurrage (countable and uncountable, plural demurrages)

1. (shipping) the detention of a ship or other freight vehicle, during delayed loading or unloading
2. compensation paid for such detention
3. a charge made for exchanging currency for bullion
4. the cost associated with owning or holding currency over a given period
5. a type of currency which requires paying a fee to store money; a type of currency that discourages using money as a store of value

• (antonym(s) of “detention of a ship, or fee paid for it”): despatch

• cranage, shippage, shorage, tonnage, wharfage