Yearning
Deep Affection
noun, する verb
If you can't stop thinking about how much you yearn for someone, that yearning can drive you crazy. Try to keep it in check, and enjoy how you can hold such deep affection for someone.
しぼ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
異国の地で、母への思慕を重ねています。
Being in a foreign country, I constantly yearn for my mother.