IPA: /ˈtɪk.lər/
KK: /ˈtɪk.lɚ/
An item or system used to help remember things or remind someone about tasks or events.
I use a tickler file to keep track of important deadlines and appointments.
Tickler → The word 'tickler' is derived from the verb 'tickle' (from Middle English *ticklen*, meaning to touch lightly) with the addition of the suffix '-er' (meaning a person who). A tickler is a person or thing that tickles or causes laughter through light touch.
Think of someone who 'touches lightly' ('tickle') to make you laugh — that's what a tickler does.