締約 （テイヤク） conclusion of a treaty

締結 （テイケツ） conclusion, execution (of a contract), entering (into treaty), fastening (as in a joint)

閉まる （しまる） to be shut, to close, to be closed, to be firm (of a body, face, etc.), to be well-knit, to be locked, to tighten, to be tightened, to become sober, to become tense

締まり （しまり） closing, shutting, firmness, tightness, discipline, control

締まり屋 （しまりや） thrifty person, stingy person, tight-fisted person

締める （しめる） to tie, to fasten, to tighten, to wear (necktie, belt), to put on, to total, to sum, to be strict with, to economize, to economise, to cut down on, to salt, to marinate, to pickle, to make sushi adding a mixture of vinegar and salt, to kill (fish, poultry, etc.)