文字 もじ食込 くいこんだそうだ
moji kuikonda sōda

Noun
Evidential Auxiliary

Expresses hearsay about a past event ("I heard that...") of 文字食込み

1. It is said that [someone] meticulously read/studied the text.; It is said that [someone] was deeply engrossed in the text.

Past/Perfective
Hearsay Evidence
Computing