う打uちchiあ合aわせるwaseru
1.
To consult or coordinate in advance regarding plans or procedures with someone, ensuring mutual understanding and agreement.
2.
To forcefully make contact or clash two objects together, often to initiate a reaction or achieve a specific result.
3.
To engage in a collaborative performance, such as playing music or singing, where participants harmoniously combine their efforts.
Example:
その仕事をブラウン氏と打ち合わせた。