Mental
Emotional, Spiritual
な adjective
Your 精神 is your spirit or your mind. If you add 的 to it, you get mental. It can mean spiritual too, but it more often shows up in reference to a person's mental or emotional state.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
この子には、今は精神的なケアが必要だと思うんです。
I believe our child needs mental care right now.
トーフグのブログが、入院中の私の精神的な支えになっていました。
Tofugu's blog gave me emotional support during my hospital stay.
彼は精神的ストレスが原因で仕事を辞めることになりました。
He had quit his job due to mental stress.
精神的に病んでいた時、毎日一人で公園をブラブラしていました。
When I was mentally troubled, I was wandering aimlessly around the park alone every day.