thralldom or thraldom
thrall-dom or thral-dom / thrôl-dəm
1. the state of being under another’s control; servitude; slavery
I love thee, my darling, both now and forever,
My heart feels the thralldom of love’s mystic spell,
‘Tis fettered with shackles which nothing can sever,
To the heart which responds to its passionate swell.
From “Love’s Plea.” by Alfred Castner King, 1874 – 1941