getting ready for bed
Refers to the routine of preparing to go to sleep, such as changing clothes, brushing teeth, and setting up bedding.
After getting ready for bed, I read a book.
子供たちの寝支度を手伝った。
I helped the children get ready for bed.
Compound of 寝 (ne, 'sleep') and 支度 (shitaku, 'preparations'). The reading ねじたく is a standard rendaku-influenced form.