1. Into the skin

See also: intradermal

• peninsula
• peninsular
• penis
• penis envy
• penitence
• penitent
• penitential
• penitentially
• penitentiary
• penitently
• penknife
• penlight
• penman
• penmanship
• Penn
• penn'orth
• penna
• pennant
• pennate
• Pennatula
• Pennatulidae
• penne
• penni
• penniless
• pennilessness