This is the 323rd most frequent German word.
gekommen
"Come" (past participle of "kommen").
The word 'gekommen' is used here as the past participle of 'kommen', forming the present perfect tense with the auxiliary verb 'bin'.
Ich bin pünktlich gekommen.
I arrived on time.
In this sentence, 'gekommen' is again the past participle of 'kommen', indicating action completed in the past.
Er ist von weit her gekommen, um uns zu besuchen.
He came from far away to visit us.
Here, 'gekommen' forms the question in present perfect tense with the auxiliary verb 'bist' to inquire about a past event.