An objection.
Physical danger from the environment, especially with risk of drowning
An obstacle that hinders achievement of a goal.
The state of being difficult, or hard to do.
An awkward situation or quarrel.
That which cannot be easily understood or believed.
A disadvantage; something that detracts or takes away.
The inhalation of a lungful of smoke from a cigarette.
A partial refund of an import fee, as when goods are re-exported from the country that collected the fee.