accorer

Accorer is a specialized technical verb from construction and shipbuilding meaning to prop up or shore up something (a wall, hull, or trench) with a temporary support beam (une accore). It's essentially unknown outside professional/technical contexts.

• Les ouvriers ont accoré le mur fissuré avant de le réparer. — The workers shored up the cracked wall before repairing it.
• Le charpentier de marine a accoré la coque en cale sèche. — The shipwright shored up the hull in dry dock.
• Il faut accorer la tranchée pour éviter un éboulement. — The trench needs to be shored up to prevent a collapse.

This is a rare technical term a general learner will almost never need to produce — don't confuse it with accorder (to grant/tune), which is a completely different, much more common verb despite the similar spelling.