Keens is a verb that means being passionate or emotional about something. Some synonyms for this word include "mourns," "laments," "grieves," and "bemoans." These terms are used to describe the feeling of sadness or regret over a loss, situation or event. To keen typically involves wailing, crying, or lamenting with an intense expression of emotion. Other synonyms might include "cries," "sobs," "weeps," or "howls," as these words also convey a strong emotional response. Additionally, words like "yearns," "longs," and "craves" can also be used in a somewhat similar context, referencing a desire or emotional attachment to something in a less dramatic way.