The term BY BLOOD RELATED is used to describe family members who are related through blood or genetics. The three crossword solutions for this term are KIN (3 letters), AKIN (4 letters), and SIB (3 letters). KIN is a shortened form of the word 'KINSHIP' which means the relationship between two people who are related by blood or marriage. AKIN is a word that means similar or related in nature. Lastly, SIB is an abbreviation for the word 'SIBLING' which is used to refer to a brother or sister.