to be in direct competition or disagreement
direkter Wettbewerb oder Meinungsverschiedenheit (direkter Wettbewerb oder Meinungsverschiedenheit)
"The two leaders went head to head in the debate."
"Die beiden Führer gingen kopfüber in die Debatte." (Die beiden Führer gingen **kopfüber** in die Debatte.)
to be upset about something that cannot be changed
to confuse two or more things
to monitor someone or something closely
To begin a process that will develop in the future.
to be unkind or without compassion
having no money at all