1. not attended to : UNHEEDED, IGNORED

found learned(US) learnt(UK) noted ascertained comprehended digested discovered gleaned grasped identified observed realized(US) recognized(US) understood saw witnessed became aware realised(UK) recognised(UK) took considered contemplated pondered thought about examined regarded studied checked out chewed over deliberated over looked at meditated over mulled over reflected on ruminated over weighed up cogitated about gave thought to lost immersed engaged involved absorbed absorpt engrossed consumed enmeshed obsessed occupied threw affected assimilated connected enraptured enthralled hooked mired preoccupied seen ensured assured made sure checked confirmed made certain seen to it verified affirmed guaranteed insured certified double-checked established satisfied oneself taken care saw to it used exercised exerted practiced(US) practised(UK) implemented drew on brought into play brought to bear played on put into action put to use put to work capitalized on effected made the most of managed regulated sourced tapped determined asked inquired(US) found out queried canvassed clarified enquired(UK) investigated probed questioned thought worried about agonized over dwelled on dwelled upon dwelt upon stewed over