The word "cock" has remarkably diverse meanings across different contexts, each with its own logical opposite. Understanding the intended sense is essential for identifying the correct antonym.
Cock = adult male chicken (rooster) → Hen = adult female chicken
Cock = symbol of aggression, vigilance, dominance → Dove = symbol of peace, gentleness, innocence
Cock (verb) = pull back hammer to prepare firing → Decock/Uncock = safely lower hammer; or Safety on = engage safety mechanism
Cock (verb) = tilt or turn up (head, hat, eyebrow) → Lower = return to neutral/downward position
Cock = valve controlling flow (stopcock, petcock) → Open valve / Outlet = point of discharge (functional opposite in flow control)
Cock = forward/upper part (cockpit, coxswain position) → Stern/Aft/Rear = backward/lower part
Cock = solid control mechanism → Melt = phase change to liquid (highly context-dependent, likely metaphorical)
In everyday English, "cock" most commonly means rooster (opposite: hen) or the firearm action (opposite: decock). The vulgar slang meaning has its own register-specific opposites. Always determine context before selecting an antonym.