这个小丑是个活宝，总能逗得孩子们咯咯笑。

The clown was such a ___tickler that he always made the children giggle.

我在手机上设置了一个提醒事项来提醒我完成日常任务。

I set up a ___tickler on my phone to remind me of daily tasks.

我的律师用备忘提醒系统来跟踪所有即将到期的案件。

My lawyer uses a ___tickler system to track all upcoming case deadlines.