row, and, besides, as well as, line up, rank with, rival, equal
並 centers on things being placed side by side in a line or on the same level: a row, lining up, or ranking equally. The conjunction senses 'and', 'besides', 'as well as' extend naturally from the idea of items standing together.
並 is a pictograph of two people standing side by side, representing the idea of lining up or being equal. The modern form retains the symmetrical, paired structure.
The two identical halves of 並 look like two people standing next to each other in a row, equal and together.
For ヘイ, imagine two people lining up to say 'hey' to each other: hey -> ヘイ, as they stand side by side.
to line up; to stand in a line
to line up; to set up; to arrange in a line
average; medium; common; ordinary
line; row; rank; list
going side-by-side; going abreast
and (also); both ... and; as well as
arranging in a line; standing in a row
roadside trees; row of trees
row of houses
ordinary; average; common; normal; like the average person; like most people
townscape; street (of stores and houses); (look of) stores and houses on street
parallel importing; grey importing; gray importing
to be uncommon
positioning side-by-side; parallel arrangement
to stand in a row (e.g. shops on a street); to line in a row; to line
row of teeth; set of teeth; dentition
coat (of hair or fur); lie of (dog's) hair
pace; step
every month
ordinary