The abstract noun "understanding" can be translated as a verb. Alternate translation: "The ruler who does not understand" (See: [[rc://en/ta/man/jit/figs-abstractnouns]])
The abstract noun "unjust gain" can be translated as a verb. Possible meanings are that this person 1) hates other people's unjust gain. Alternate translation: "the one who becomes angry when other people gain dishonestly" Or 2)he would never want to be dishonest. Alternate translation: "the one who hates gaining dishonestly" (See: [[rc://en/ta/man/jit/figs-abstractnouns]])
# the one
This phrase can refer to 1) the "ruler" or 2) any person.
Possible meanings are 1) this is an idiom that means his living for more time. Alternate translation: "live longer" or 2) this is an idiom that means extending the length of his reign. Alternate translation: "rule for a longer time" (See: [[rc://en/ta/man/jit/figs-idiom]])