trousers
Because you need one trouser for each leg - a pair of trousersTrousers is a plural noun referring to an outer garment covering the body from the waist to the ankles, with a separate part for each leg.The single form is used in certain circumstances:I've torn my trouser pocketShe wore a stunning trouser suitTrouser pressHe tore his left trouser leg
No, trouser is not a noun. 'Trousers' is a plural but it is still a noun.
The noun 'trousers' an uncountable noun, a form of binary noun, a word for something with two parts making up the whole; a shortened form for 'a pair of'.The singular form is a pair of trousers.The plural form is pairs of trousers.
Practically any noun could be the objet of a preposition. But trouser is more often an adjective form of the noun "trousers."
pants, trouser, scissors, tweezers
Trouser snout is the feminine of "trouser snake" (aka camel toe)
There is no plural form. Do and Do not are verbs
The plural form of him, her, or it is them. (objective pronouns)
Bridges is the plural form of bridge.
The plural form of "is" is "are."
The plural form of "was" is "were."
The plural form of "I" is "we."