回忆
huíyì
to recall, to reminisce; memory, recollection
verb/noun
Example
每当看到这张照片，我就会回忆起童年的快乐时光。
Měi dāng kàn dào zhè zhāng zhàopiàn, wǒ jiù huì huíyì qǐ tóngnián de kuàilè shíguāng.
Whenever I see this photo, I recall the happy times of my childhood.
A versatile word that can function as both a verb (to remember/recall) and a noun (memory/recollection). Often used with 起 (qǐ) to form 回忆起, meaning 'to recall' or 'to think back to'.