She takes more sick time than the other coworkers, so it’s suspicious whether she’s really sick or not.
This is a single kanji with an い on the end, meaning you know it's probably an adjective. What's the adjective form of suspicious? Also suspicious!
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you:
When you think of people who are suspicious or shady, you naturally think of people named Aya. Just think of our artist Aya, she's super suspicious and shady!