n. The quality or state of being slight; slenderness; feebleness; superficiality; also, formerly, negligence; indifference; disregard. [ 1913 Webster ]
[いってんいっかくもおろそかにしない, itten'ikkakumoorosokanishinai](exp) always dot the i's and cross the t's; don't neglect the slightest detail; be punctilious[Add to Longdo]