Indo European "pele-" meaning "to be flat, to spread"
became
Indo European "plat-" meaning
"to spread"
Greek "platus" meaning "broad"
plate

platypus
platitude
Spanish "plata" meaning "silver plate"
platinum
place

plateau
piazza
Latin "flado" meaning
"flat-cake"
flan
Old Swedish "flundra" meaning "flat-fish"
flounder
Old Norse "flatr" meaning "flat"
flat
Old English "flett" meaning "floor"
flat (UK English for "apartment")

Old French "flater" meaning "to smooth down"
flatter
Latin "planta" meaning "sole of the foot"
Latin "plantare" meaning "to
drive into the ground with the
foot"
Latin "planta" meaning "a
sprout"
clan
plant

supplant

Greek "planastai" meaning "to
spread out, to wander"
planet

Greek "plassein" meaning "to
spread out, to mold"
plaster
plasma

plastic

Latin "planus" meaning "flat,
level, plain"
airplane
esplanade
explain

plan

plane
plain

pianoforte
piano
Latin "palma" meaning "palm of hand"
palm
inspired
palm
tree

Germanic "floruz" meaning "floor"
Old English "flor" meaning
"floor"
floor
Germanic "felthuz" meaning "flat
land"
Dutch "veldt"
veldt

feldspar
Old English "feld" meaning
"field"

field
Germanic "flan" meaning "to
wander"
French "flaner" meaning "to
wander the streets"
French "flaneur" meaning "an
idle man"
flaneur
Slavic "polje" meaning "flat land"
Polish "polak" meaning "a person
who farms the flat land"
polka meaning "a Polish woman"
polka (a kind of dance)
polka dot