familial
Familial (adjective) means relating to a family, or passed down within one. Example: “The disease has a strong familial pattern, running through three generations.”
How to use familial
Learner’s notesIn plain EnglishTo do with family — often used for traits or conditions that run in a family.
Mostly used in slightly formal or medical contexts ("familial risk of heart disease") rather than everyday chat, where "family" as an adjective works fine.
Fill the gap
Can you complete this real example?
The disease has a strong _____ pattern, running through three generations.
Etymology
From French familial, ultimately from Latin familia ("household, family") — the same root that gives us "family" itself.