back and fill
(nautical) To manage the sails of a ship so that the wind strikes them alternately in front and behind, in order to keep the ship in the middle of a river or channel while the current or tide carries the vessel against the wind.
(uncountable) The state of being free, of not being imprisoned or enslaved. / (countable) The lack of a specific constraint, or of constraints in general; a state of being free, unconstrained.
(mineralogy) A monoclinic-prismatic white mineral containing antimony, arsenic, molybdenum, and oxygen.
A surname from Tagalog.
潮流が強く押し、風が逆らう中、舵手は乗組員に帆を前後交互に操作して船を水路の中央に留めるよう命じた。
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