To keep under LOCK and key

Insights

Control and Possession

Metaphorically, it signifies maintaining strict control over someone or something, emphasizing ownership, authority, or protection—especially over people, secrets, or possessions.

Confinement and Suppression

It can also suggest restricting freedom, whether physical, emotional, or intellectual—imprisonment, enforced secrecy, or the repression of ideas or desires.

Security through Exclusion

The proverb implies that true security comes from exclusion and boundary-setting, often reflecting societal or personal attempts to guard against intrusion, loss, or corruption.

Patriarchal Possessiveness

Dryden’s and Shakespeare’s references highlight the historical use of the phrase in relation to women—emphasizing themes of chastity, control, and patriarchal authority. It reflects cultural norms in which possession was equated with moral virtue and honor.

Fear of Loss and Violation

The expression reveals an underlying fear of vulnerability. Whether guarding treasure, secrets, or people, it shows a defensive stance born of mistrust—protection through confinement.

Psychological and Emotional Repression

Beyond physical confinement, the phrase also captures emotional suppression—keeping feelings or memories ‘under lock and key’ as a mechanism of control or denial.

Rhetorical Devices

Synecdoche

‘Lock and key’ stands in for the broader idea of confinement or security, using specific physical objects to represent a general condition.

Alliteration

The phrase’s paired 'l' and 'k' sounds provide rhythmic cohesion and mnemonic power, helping it endure as a common idiom.

Dual Structure

The phrase’s compound form ('lock and key') reinforces completeness and totality, emphasizing thorough control or protection.