When toward is used as an adjective, its meaning is not the same as that of the adverb or preposition. ... It developed its meaning from 'in the direction to' through various further meanings: 'approaching', 'coming [in time]', 'impending';

Is the word toward an adjective?

toward used as an adjective:

Approaching, coming near; impending.

Is towards an adjective or adverb?

Be careful: Towards is a preposition, not an adverb, so it is always followed by a noun or a pronoun.