{"era":"1300s–present","word":"assure","meaning":"to make certain, to give confidence to","children":[{"era":"1200s","word":"assurer","meaning":"to reassure, to secure","children":[{"era":"1100s","word":"assecurare","meaning":"to make safe","children":[{"era":"classical","word":"ad- + securus","meaning":"ad- (to/toward) + securus (safe, carefree: se- without + cura care)","children":[{"era":"prehistoric","word":"*kʷeys-","meaning":"to heed, observe (root of cura)","children":[],"language":"Proto-Indo-European"}],"language":"Classical Latin"}],"language":"Medieval Latin"}],"language":"Old French"}],"language":"Modern English"}