«جَدِّي جَهْدِي»
My earnest endeavor is my labor or effort.
The pair shares a closely related pattern of sounds while diverging in the central consonantal structure. It illustrates why medial variation is examined separately among imperfect forms of jinās.
A complete analysis identifies the shared sequence, the position of the inserted material, and the independent meanings. Simply observing that both words begin with jīm would not establish the specific subtype.