origin: (1400s) Latin; fīli(us)= "son" or filia= daughter,
Anything of, applying to, or befitting a child. It may help to think of the synonym of this word being "daughterly", and the antonym being "parental". To relate to something in a filial way is to acknowledge a lineage from the point of view of the offspring (or following generations).
Example: The filly's filial feelings exhibited themselves in how focused she was about staying at the mare's flank, while her filial lineage of blue ribbons were flaunted in fleet-footed frolicking!