They share a deep but completely platonic friendship.
It's hard for some people to believe in truly platonic relationships between men and women.
One of his quirks is organizing his books by color.
Despite her quirks, everyone enjoys working with her.
Their constant tit-for-tat arguments tired everyone around them.
In international politics, tit-for-tat sanctions are common.
The building was shut down due to substandard safety measures.
Many consumers complained about the substandard service.