A redoubt is a fort or fort system usually consisting of an enclosed defensive emplacement outside a larger fort, usually relying on earthworks, though others are constructed of stone or brick.
Look up innuendo in Wiktionary, the free dictionary. An innuendo is an hint, insinuation or intimation about a person or thing, especially of a denigrating or a derogatory nature. It can also be a remark or question, typically disparaging (also called insinuation), that works obliquely by allusion.
The noun allusion means an indirect reference to a person, event, or thing. (The verb form of allusion is allude.) The noun illusion means a deceptive appearance or a false idea. (The adjectival form of illusion is illusory.) See also: Allusion (Glossary) Commonly Confused Words: Allude and Elude. Commonly Confused Words: Allusive and Elusive.