‘Nava’ means ‘nine’ and ‘ratri’ is made up of ‘ra’ which also means ‘night’ and ‘tri’ meaning the three aspects of our life – body, mind and soul.
There are three types of botherations or problems that may affect a person – physical, mental and spiritual. That which gives you relief from all these difficulties is ‘ratri’.
‘Ratri’ or night relieves you of misery and brings comfort. The night relaxes everybody; whether happy, unhappy or miserable, everybody goes to sleep.
Navratri is a celebration of the spirit or prana which alone can destroy mahishasura (inertia), shumbha-nishumbha (pride and shame) and madhu-kaitabh (extreme forms of craving and aversion). They are completely opposites, yet complementary.
Inertia, deeply ingrained negativities and obsessions (raktabeejasura), unreasonable logics (chanda-munda) and blurred vision (dhoomralochan) can be overcomed only by raising the level of prana and shakti, the life-force energy.