ثقف

2 ثقّفهُ ثقف ثقفه ثقفة , (S, Msb, K,) inf. n. تَثْقِيفٌ, (S, Mgh, K, KL,) He straightened it, or made it even, (S, Mgh, K, KL,) or straightened what was crooked thereof; (Msb;) namely, a spear, (S, KL,) [and a bow, (see ثِقَافٌ,)] or a crooked thing; with the ثِقَاف: (Mgh:) [and so ↓ ثَقَفَهُ, accord. to an explanation of the inf. n. ثَقْفٌ in the KL.] تَثْقِيفُ السَّهْمِ عَلَى القَوْسِ, as meaning The directing the arrow upon the bow straightly towards the object aimed at, is not approved. (Mgh.) ― -b2- Hence, (Mgh,) (tropical:) He disciplined him, or educated him well, and amended him, or improved him. (Mgh, TA.) You say, لَوْلَا تَثْقِيفُكَ وَتَوْقِيفُكَ مَا كُنْتُ شَيْئًا (tropical:) [ But for thy disciplining, or good educating, and amending, or improving, and thy teaching, I had not been anything ]. (TA.) ― -b3- You say also, of vinegar, يُثَقِّفُ الطَّعَامَ, i. e. It makes food acid. (Har p. 227.)