in strong disagreement or conflict
en fort désaccord ou conflit (en fort désaccord ou conflit)
"The two departments have been at loggerheads over the new policy."
"Les deux départements ont été en fort désaccord sur la nouvelle politique." (les deux départements ont été at loggerheads sur la nouvelle politique)
to direct all your attention and efforts toward one thing
to examine something in great depth
a person who always follows the law
people cannot change their basic character or nature
a conflict between two determined people
to progress or improve very quickly