乂

yi 

to govern, control

保乂 to protect and govern; 

two crossed blades (like scissors or shears), representing pruning plants (agricultural tool) cutting away excess (metaphor for discipline).

义

yi

righteousness, justice, morality

meaning

crossed blades (乂) fighting for a little  - but valuable - piece (丶) of justice in a righteous, balanced way

议

lun

to discuss / consult

to deliberate

the words (讠) of what is right and just (义) are pouring out during a discussion (议)

主

zhu

master

king is nothing without a master holding a lamp with a flame

住

zhu

to live, to reside, to stop, to stay

住在北京 live in Beijing

a person (亻) needs to master (主) how to create a candle (主) if he wants to live inside four walls

注

zhu

to pour, inject;

to concentrate

The water master (主) regulates how the water (氵) pours through a dam