Arabic grammar terms

Below are the names and definitions of some Arabic grammar terms which I sometimes struggle to recall:

• Ajwaf (أَجْوَف) – a root verb which has an alif, waw or yaa as its second letter, e.g. قَالَ.
• Lafeef Mafrooq (لَفِيف مَفْرُوق) – a root verb which has an alif, waw or yaa as its first and third letter, e.g. وَلَى.
• Lafeef Maqroon (لَفِيف مَقْرُون) – a root verb which has an alif, waw or yaa as its second and third letter, e.g. طَوَى.
• Mithaal (مِثال) – a root verb which has an alif, waw or yaa as its first letter, e.g. وَعَدَ.
• Mudhaa'af (مُضَاعَف) – a root verb which has the same letter in two positions, e.g. سَبَّ.
• Naaqis (ناقِص) – a root verb which has an alif, waw or yaa as its third letter, e.g. رَمَى.