It means you put the key in the lock. The plug is the name of the part of a lock cylinder that turns when you turn the key.
A keyway broach is consider a cleaning tool to help remove certain material from whatever object you are cleaning. Broaching is the term used for the use of this tool.
Plug
ピストン /pi su ton/is the Japanese term for 'piston', inserted from English.
The term venipuncture is a medical term which means to use intravenous for the sampling of blood for blood analysis. A small needle is inserted into the vein to withdraw blood.
Spark plug wires
The mathematical term for "mean" is "mean".The popular, or colloquial term for "mean" is "average".
Check the spark plug and the wire on the 8th spark cylinder. Corosion, short, or just bad.
Estoppel essentially is the concept that prevent a person from denying anything, if something has been established as fact in a court of law. This comes from the Old French term estoupail, which means stopper plug.
Hypodermic means under the skin. Hypo means under, dermis (dermic) means skin. Like a hypodermic needle is inserted under the skin.
what term information mean
Depending on what you mean it could differ. スレイヤー /su rei ya/ is a Japanese term inserted from English which can be used generally, i.e. as a proper noun or just a noun meaning killer etc.
ダンジョン /dan jon/ is the same term inserted into Japanese. As for a Japanese term for it you can use 地下牢 /chi ka rou/ meaning same.