user-unfriendly
UKUS
Definitions
adj.
Difficult or confusing to use
难以使用的；不友好的
Root Breakdown
Root-deriveduser + un- (not) + friendly = not friendly to the user — the opposite of user-friendly.
Root us still carries 68 more wordsExample Sentences
- 1.
The old software was so user-unfriendly that staff avoided it.