That can or does physically penetrate something; piercing, penetrating.
That can penetrate opposition defences.
Pertaining to sexual activity involving penetration by the penis.
Displaying insight or discrimination; acute; penetrating.
Without consideration, awareness or sound judgement
Lacking meaning or purpose; without common sense.
Without a discernible meaning or purpose, especially of a violent or evil act.
Without feeling or consciousness; deprived of sensation.