らしかった

seemed, apparently was, was like, was characteristic of

→ らしい
らし -like; characteristic of + かっ Past tense + た Past tense
auxiliary · past tense Rare #41,712
seemed, apparently was Used to express an inference or impression about the past.
JA: 外は雨だったらしかった。
EN: Apparently, it was raining outside.
was like, was characteristic of In this meaning, it describes something as having the qualities typical of the preceding noun.
JA: 彼の考え方は人間らしかった。
EN: His way of thinking was very human.
Conjugation of らしい
Indicative past
らしかった

彼は事実を隠すつもりらしかった。

He seemed intent on hiding the truth.

バスは遅れていたらしかった。

Apparently, the bus was running late.

周りの事情からすると彼女の話は本当らしかった。

Given the circumstances, what she said seemed to be true.

私の長い旅で出会った人物の中で彼こそは、まさに人間らしかった

Of all the people I met on my long journey, he was the most genuinely human.

— スター・トレックII カーンの逆襲 (1982)