1. Godan verb with 'ku' ending, Intransitive verb

   to calm down; to compose oneself; to regain presence of mind; to relax

   彼は当惑して落ち着きませんでした。

2. to calm down; to settle down; to die down; to become stable; to abate

3. to settle down (in a location, job, etc.); to settle in

4. to be settled (of an arrangement, conclusion, etc.); to be fixed; to have been reached

5. to harmonize with; to harmonise with; to match; to suit; to fit

6. to be unobtrusive; to be quiet; to be subdued

   usu. before a noun as 落ち着いたsee 落ち着いたsee おちついた・3

Also written 落ちつく【おちつく】ochitsuku、落着く【おちつく】ochitsuku、落ち付く【おちつく】ochitsuku