longtime

形容詞

Having endured for a long period of time.

日本語の意味

長い期間にわたる / 長い間続いた

After years of collaborating, the longtime partners finally launched their joint venture.

長年にわたって協力してきたパートナーたちは、ついに共同事業を立ち上げた。

意味（1）

Having endured for a long period of time.

My longtime friend, since birth actually, called and gently broke the bad news to me.

more longtime

（ comparative ）

most longtime

（ superlative ）