A central cohesive source of stability and security; a person or thing that is critical to a system or organisation.
A pin inserted through holes at the end of an axle or shaft, so as to secure a wheel or shaft-mounted device.
To adopt as, or serve as, a central cohesive source of stability and security.
The essence or core of an issue, argument etc.
a pointing stick
The clitoris.
A small lump or knob.
To push; to nudge.
To beckon.
To hit the ball weakly.