Bottomless pit
abyss
to lure or entice by deception
Decoy
Daringly often recklessly adventurous
Audacious
To firmly plant or establish
Engraft
Choice of one of two options
Alternative
Allowable
Permissible
Not aggravating but interesting
Possessing a friendly manner or temperament
Genial
To start
Commence
Persistent in harshness or serverity
Relentless
facial expression
Countenance
Incapable of change
Invariable
Concerted
To keep something desirable visible but out of reach
Tantalize
To reduce or damage in quality or worth
Deteriórate
Exceptionally steep
Precipitous
To judge or conclude based on guesswork
Conjecture
Watch kept while other are normally sleeping
Vigil
Yo originate or send out from a source
Emanate
Watchful for danger or error
Vigilant