1. (noun) an enlisted man of the lowest rank in the Army or Marines

• buck private
• common soldier

2. (adjective) concerning one person exclusively

• individual

3. (adjective) not expressed

• secret

1. (adjective) confined to particular persons or groups or providing privacy

• backstage
• offstage
• clannish
• cliquish
• clubby
• snobbish
• snobby
• cloistered
• reclusive
• secluded
• sequestered
• close
• closed-door
• confidential
• secret
• confidential
• head-to-head
• tete-a-tete
• insular
• nonpublic
• one-on-one
• privy
• secluded
• secret
• semiprivate
• toffee-nosed

2. (adjective) concerning things deeply private and personal

• personal

3. (adjective) concerning one person exclusively

• personal

4. (adjective) not expressed

• inward

1. (noun) an enlisted man of the lowest rank in the Army or Marines

• enlisted man

1. (adjective) confined to particular persons or groups or providing privacy

• esoteric
• personal

1. (adjective) confined to particular persons or groups or providing privacy

• privacy
• privateness
• seclusion

2. (adjective) concerning things deeply private and personal

• concealment
• privacy
• privateness
• secrecy
• privacy
• privateness
• seclusion

3. (adjective) not expressed

• concealment
• privacy
• privateness
• secrecy

1. (adjective) confined to particular persons or groups or providing privacy

• public