生活力缺乏 meaning in English

hypotrophy

We try with many configurations of hair , with a great moustache , with large beard , with long hair , without hair … eventually we end up choosing to make him bald with a bit of hair over his ears , and as he ' s very absent - minded we added a little 3 or 4 - day beard
我们尝试过许多种头发的造型，有许多的小绒发的，连着大量胡须的，长发的，没有头发的… …最后我们定稿选择了让他秃顶，并且在耳后有一小撮头发，表现他个性中的生活力缺乏我们加了些看起来是留了三四天的胡子。