取り付く， 取りつく， 取付く， とりつく
1. to cling to, to hold on to, to hold fast to
2. to grapple
3. to set about doing, to begin, to commence, to undertake
4. to possess (someone; of an evil spirit, idea, etc.), to take hold of, to haunt
5. to obtain a clue, to get a lead
tbd