Which of the following is an example of a code word?

• A. Counterword 'Square' / 'Baseball'; one-word code word 'Fireball'.
• B. 'Open Sesame'.
• C. 'Secret123'.
• D. 'Weather'.

Answer: (A)

Code words are short, easy-to-say tokens chosen in advance and used in field communications to authorize actions or identify units without exposing the actual instruction. A code word should be a single, pronounceable word that stands for a specific directive in the prearranged code list. In this set, the clear fit is a one-word token like Fireball. It’s a memorable, unambiguous cue that can be transmitted quickly and interpreted by the receiver as a particular action or status.

Open Sesame reads as a folklore phrase rather than a formal field code; Secret123 looks like a login password rather than a broadcast code word; Weather is a generic noun with no assigned signaling meaning in an operational lexicon. The mention of a counterword highlights that some systems pair terms for verification, but the essential quality of a code word is a distinct, preassigned token used to convey a specific signal.