thinker; deep thinker; contemplative person
Refers to a person who engages in deep, abstract thought or philosophical reflection. Often implies a scholarly or introspective nature.
He is more of a thinker than a doer.
その哲学者は真の思索家だった。
That philosopher was a true thinker.
Compound of 思索 (shisaku, 'speculation; contemplation') and 家 (ka, 'person; specialist').