To Do Without
To Miss An Event, To Fail To Do
transitive verb, godan verb
かかす
欠かす （かかす） To Do Without, To Miss An Event, To Fail To Do
欠く （かく） To Lack Something
欠ける （かける） To Get Chipped, To Be Lacking
逃す （のがす） To Miss, To Lose, To Let Go
To Miss An Event 欠かす is to lack 欠 (miss) out.