っぽい

1. Origins, structure, and basic meaning

• Structure: っぽい attaches to nouns and certain verb or adjective stems to describe a conspicuous impression or a disposition toward an action.
• Basic usage: 彼は忘れっぽいので、予定を手帳に書く。 explains that he records his plans because he is forgetful.

2. Common pitfalls and similar expressions

• An impression versus an actual price
  • 安い時計 is a low-priced watch, whereas 安っぽい時計 is one that looks cheap. Adding っぽい shifts the focus from price information to an evaluation of appearance or quality.
• Inflecting like an i-adjective
  • Change the final い, as in 忘れっぽくなる or 安っぽかった. Before a noun, connect directly, as in 忘れっぽい人.