What is the meaning of Handeln?

to act; to take action

to negotiate; to bargain; to haggle

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

to trade

to tip as; to take into consideration as being

to discuss; to deal with; to write or speak about [with von]

to be about; to deal with

to be, to be a case of, to be a matter of, to concern [with um (+ accusative) ‘something’ and bei (+ dative) ‘with respect to something else’]

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

definite singular of handel

Source: wiktionary.org