What was the Navajo term for "submarine" in their code?

The Navajo term for "submarine" in their code is accurately represented by the choice that translates to "iron fish." This terminology was creatively developed to serve the military’s unique communication needs during World War II. The use of metaphorical language allowed the Navajo Code Talkers to convey complex military concepts in a way that remained secure from enemy interception. "Béésh bich'ii," meaning "iron fish," aptly illustrates how the Navajo language employed vivid imagery to create a code that was both functional and culturally relevant.

The other options represent different terms that do not align with the specific meaning of "submarine" within the context of the Navajo code. Each term might relate to various other concepts or objects, showcasing the complexity and richness of the Navajo language. However, it is the chosen term that accurately captures the intended meaning for submarine in a military context.