What is the meaning of Handeln?

to act; to take action

to negotiate; to bargain; to haggle

to trade in; to deal; to sell [+ mit (object)]

to trade

to tip as; to take into consideration as being

to discuss; to deal with; to write or speak about [+ von (object)]

to be about; to deal with

to be, to be a case of, to be a matter of (Often used to introduce the subject before giving it a name, or to indicate some uncertainty regarding exact amounts. Literally: it itself has to do with ...) [+ um (object)]

to handle something; to control; to deal with in an organised fashion

definite singular of handel

Source: wiktionary.org