I.
noun
ADJECTIVE
▪ open
▪
The horses galloped across the open ~s.
▪ rolling
▪
miles of rolling ~, made fertile by the river
▪ great , vast
▪ flat , flood
▪ fertile
▪
fertile ~s suitable for farming
▪ arid , barren
▪ grassy
▪ coastal
VERB + PLAIN
▪ cross , roam
▪
Herds of buffalo roamed these ~s.
PREPOSITION
▪ across a/the ~
▪
Cattle move freely across the grassy ~.
▪ in a/the ~
▪
the Olduvai Gorge in the vast ~ of Tanzania
▪ on a/the ~
▪
Nothing grew on the ~.
II.
adj.
1 simple/not decorated
VERBS
▪ be , look , seem
ADVERB
▪ extremely , fairly , very , etc.
▪
The food was fairly ~, but well cooked.
▪ completely
▪
The dress was completely ~, but quite stunning.
PHRASES
▪ ~ blue, white, etc.
▪
a ~ white shirt
2 clear
VERBS
▪ be , seem
▪ become
▪ make sth
▪
They made it ~ that they were against the idea.
ADVERB
▪ fairly , very , etc.
▪ absolutely , perfectly , quite
▪
Within weeks, it became perfectly ~ that we were in the grip of a tyrant.
▪ increasingly
▪ reasonably ( esp. BrE )
PREPOSITION
▪ to
▪
It is all very ~ to me.
Plain is used with these nouns: ↑ carpet , ↑ chocolate , ↑ clothes , ↑ common sense , ↑ cotton , ↑ crisp , ↑ dress , ↑ English , ↑ envelope , ↑ fabric , ↑ face , ↑ fact , ↑ fare , ↑ flour , ↑ folk , ↑ food , ↑ fun , ↑ glass , ↑ language , ↑ linen , ↑ luck , ↑ paper , ↑ prose , ↑ shirt , ↑ stupidity , ↑ T-shirt , ↑ text , ↑ tile , ↑ truth , ↑ white , ↑ woman , ↑ word , ↑ wrapper , ↑ yogurt
III.
adv.
Plain is used with these adjectives: ↑ bonkers , ↑ creepy , daft, ↑ dumb , ↑ ignorant , ↑ lazy , ↑ lucky , ↑ old-fashioned , ↑ rude , ↑ scared , ↑ silly , ↑ stupid , ↑ ugly , ↑ wrong