If you describe something bad as undue, you mean that it is greater or more extreme than you think is reasonable or appropriate.
This would help the families to survive the drought without undue suffering.
这将帮助这些家庭度过这场旱灾,不至于遭受过多的痛苦。
It is unrealistic to put undue pressure on ourselves by saying we are the best.
自夸是最好的是给自己施加过多的压力,这种做法不切实际。