nightMare or Night horse

Taking a look at this word nightmare- it conjures childhood terrors.  We can still have some of our unconsciousness back in childhood.  I do! Mare is a female horse.  Perhaps looking at one's night - shadow, with equanimity of what is hidden yet also visible if we know how to look... - the wild feminine...  There is richness in the dark that is asking to be mined (mine - owned).  Our own unique treasure trove, if we approach it wisely, with gentle compassion... befriending our night horse?