一切經音義 30.101

30.101

根鈍（下途頓反蒼頡篇云鈍頑也如淳注史記云頑鈍猶無廉愚也淮南子云識見闇濁也聲類云不利也說文從金屯聲屯音突敦反也）。

Dull faculties (根鈍: the second character has the fanqie tu-dun; the Cangjiepian states that 鈍 means stubborn and dense; Ru Chun's commentary on the Shiji states that stubborn and dense is like lacking integrity and being foolish; the Huainanzi states that it means understanding and perception are dark and turbid; the Shenglei states that it means blunt and sharp-less; the Shuowen states that it is formed from 'metal' [金] with 屯 as phonetic; 屯 has the fanqie tu-dun).