The word is formed from two parts (Pali root sañjānana / sañjānāti):

1. Saṃ  (සං) – Together, thoroughly, or completely

2. Jñā / Jānāti (ජානාති) – To know, observe, or understand

Literally, it means "knowing completely". 

Upul Sir's explaination: "Sanjāna refers to an integrated or gathered understanding. Rather than an analytical mind that divides and dissects, it represents the wisdom that holds everything together."