جَنَاحَ الذُّلِّ
The wing of humility.
An explicit metaphor names the image-source while leaving the intended subject unspoken. Here humility (“al-dhull”) is expressed, but the bird to which it is likened is not named.
A visible image-word is not necessarily the central borrowed expression. “Janāḥ” functions as the imagined characteristic of the unstated bird, which explains the conventional account in terms of an implicit metaphor and its imaginative attribute.