A player not making a declaration in games.

An individual failing to disclose information legally.

Someone who does not declare income for taxation.

A person avoiding statement of intentions or opinions.

One who refrains from announcing results or scores.

**Undeclared**: Not officially stated or announced.

**Unannounced**: Arriving without prior notice or declaration.

**Implicit**: Suggested but not openly expressed; implied.

**Covert**: Concealed, hidden from public view or knowledge.

**Discreet**: Careful and circumspect in speech/action; tactful silence.

**Reticent**: Reserved, reluctant to speak out publicly about something.