even an unruly horse can be tamed
Proverb meaning that even a difficult or wild person can be brought under control with the right approach or person. Literally, 'even the horse at the back door has a matching bit'.
There is a proverb, 'even an unruly horse can be tamed.'
Standard kanji form of the proverb.
Variant kanji spelling using 合い口 instead of 相口.
A proverb using 相口 in its sense of compatibility: even a horse kept at the back of the house has someone or something that suits it. It expresses that an effective match can be found even for a difficult subject.