IPA: //kɔɪˈtæli//
KK: /kɔɪˈtɑli/
In a manner related to sexual intercourse.
The couple expressed their love coitally, deepening their bond.
Coitally is derived from "coital" (from Latin "coitus", meaning a coming together or sexual intercourse) and the suffix "-ly" (meaning in a manner of). The word "coitally" refers to something done in a manner related to sexual intercourse.
Think of 'coital' which relates to a 'coming together' in a sexual context, and the '-ly' indicates the manner, so coitally means in a manner related to sexual intercourse.