1. Roots – ketu represents going into the root or base of everything, where ever ketu sit in horoscope we will always try to find reason or the purpose behind everything related to that house. We  like to travelling in reverse gear or going in history regarding significant of the house wherever ketu sits 

2. Flag – flag is something we put over the things which have captured historically by the symbol marked in the flag or whatever flag display like our national monument or parliament or temples , basically where ever ketu sits the things associated with that house have already been captured by us in last birth , hence it become knowing without learning, past birth knowledge or expertise , which ever house ketu sits u don’t need to be taught about that because it’s always inside you. 

3. Headless – ketu is headless warrior, hence direction less, we are extremely intolerant if anyone point finger towards us regarding significant of the house where ever ketu sit in our chart , it’s headless hence we can attack anyone who so ever point fingers, doesn’t matter who ever it is or how close they’re to us  

4. Boundary – Ketu represents boundary , where ever it’s placed in our horoscope, the house,  we are bounded by pre set boundaries of that house. In one way we can ketu is Law of this world or any type of boundaries like our constitution etc that’s why ketu is closely relates to law profession.  Where ever is ketu , the house placement and Whatever living being is associated will live life in pre set boundaries for themselves.