Loggerheads

She's at loggerheads with her mother.

They really are at loggerheads.

Tom is at loggerheads with his mother-in-law, Mary.

Those two are always at loggerheads with each other.

They've been at loggerheads for years.

My siblings are often at loggerheads over toys.

Loggerheads is a local term for a harmless plant called the knapweed (centaurea nigra) […]