He began unfastening his padded robe.他便动手解开棉袍的纽扣.She began unfastening the collar of her gown.她动手解她件长袍的领子....

v.解开（尤指衣服或带子）( unfasten的现在分词 )，松开，解开，脱开，松开...

unfastening的音标：...