dark; dim / sombre; gloomy

(martial arts, weaponry) a hidden weapon

thorough knowledge of

know well, be familiar with, be well informed about

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

container, vessel / a tool, a utensil / one's degree of ability: talent, calibre / female genitalia: a vagina

darkness

darkness