noun
party loyalty; love for one's party
Refers to a strong sense of devotion or allegiance to a political party. Often used in political contexts.
彼の愛党心は誰にも負けない。
His party loyalty is second to none.
愛党心が強いあまり、他の意見に耳を貸さない人もいる。
Some people are so fiercely loyal to their party that they won't listen to other opinions.
党員 refers to a party member, while 愛党心 describes the feeling of loyalty itself.
Compound of 愛 (love), 党 (party), and 心 (heart/spirit). The exact historical derivation is uncertain, but the word follows a common Sino-Japanese pattern for abstract virtues.