WATCHFUL Copy link • WATCHFULvigilans (the proper word): vigil (poetical). To be watchful, vigilem esse; vigilare: advigilare: to keep a watchful eye upon anything or anybody, diligenter observare, custodire aliquid or aliquem; sedulo curare aliquid: to be watchful over one’s self, se ipsum diligenter observare, custodire; *diligenter cavere a peccatis.