This is the 16410th most frequent Turkish word.
yattı
"Yattı" means "lay down" or "went to bed" in English.
The word 'yattı' here metaphorically means that tasks or plans were canceled or rendered inactive.
Planlar değişince işler yattı.
When plans changed, tasks were canceled.
Here, 'yattı' is used to indicate that someone went to bed or laid down for sleeping.
Ahmet dün akşam erken yattı.
Ahmet went to bed early last night.
In this case, 'yattı' describes an object, the ship, laying or grounding inclined on the land.