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Sentence

彼かれはペンをなぶりながら考かんがえ込こんでいた。

Span Details

ペン

pen

noun

play with; fiddle with; tinker with

-> なぶるgodan verb

考かんがえ込こん

ponder deeply; brood; be lost in thought

-> 考え込むgodan verb

ongoing or resultant state

-> ているgrammar

past tense or completed action