English thinker

← Danish tænker (cognate)

← German Denker (cognate)

← English think (suffix)

← English er (suffix)

← Middle English thinkere (inherited)

← West Frisian tinker (cognate)

← Dutch denker (cognate)

← Swedish tänkare (cognate)

→ English freethinker (affix)

→ English unthinker (prefix)

→ English nonthinker (prefix)

→ English groupthinker (compound)

→ Norwegian Bokmål tenker (link)