IPA: //əˈtɛknɪk//
KK: /əˈtɛknɪk/
Lacking knowledge or skill in technical or artistic areas.
The design was criticized for being atechnically sound but visually unappealing.
Atechnics is formed from "a-" (meaning without) and "technics" (from Greek "techne", meaning art or skill). The word "atechnic" refers to a lack of skill or art in a particular area.
Think of 'without' ('a-') any 'skill' ('techne') — that's why 'atechnic' means lacking skill.