trivial

Of little value or importance; unworthy of serious attention.

• trivially/ˈtrɪviəli/(adv)无关紧要地
• triviality/ˌtrɪviˈælɪti/(n)无关紧要的事

• trivial matter
• trivial detail
• trivial complaint
• seem trivial
• trivialise an issue

1. 1.Don't waste the meeting on trivial details — save it for decisions that actually require group input. (management)
2. 2.What looks trivial at the start can become a much bigger issue if it's ignored. (risk)

• minor/ˈmaɪnər/— less important; often relative
• petty/ˈpɛti/— of little significance; also means small-minded
• insignificant/ˌɪnsɪɡˈnɪfɪkənt/— too small to be of consequence

from Latin "trivialis" = common, commonplace — from "trivium" = three roads meeting (a busy intersection, thus "ordinary")