Play NYT Connections Puzzle #616 Wed, Jan 15

Find groups of four related words Need hints?

Solve NYT Connections puzzle #616 - Group 16 words into 4 categories: MECHANISM, MEDIUM, TOOL, VEHICLE, LIGHT, LOW, SHORT, SHY, DIRTY, DRY, PERFECT, WET, BIG, PEANUT, ROBOT, TOAD.