i Register
In some senses, reck is marked as archaic, obsolete. Watch for register when choosing this word.
verb
To take account of (someone or something); to care for; to consider, to heed, to regard.
Do not, as some ungracious pastors do, / Show me the steep and thorny way to heaven, / Whiles, like a puffed and reckless libertine, / Himself the primrose path of dalliance treads, / And recks not his own rede.
[…]with that care lost / went all his fear: of God, or hell, or worse / he recked not[…]
To want (to do something); to desire to, to be inclined to, to care to.
My master is of churlish disposition, / And little recks to find the way to heaven / By doing deeds of hospitality.
To know about, to know of, to be aware of.
Little recked the busy multitude in that great smoky town of Blackingham of the solemn glories of the fading woods, with all their mellow brown and crimson foliage; little dreamed they of gorgeous sunsets, purple clouds, roseate mists, and lingering lovely-coloured lights in mountain passes; […]
To reckon, to consider, to regard (someone or something) as.
To concern (someone); to be important or of interest to; to matter.
It recks not!
What recks it them?