A much better answer is erstwhile, meaning "in the past." Hence meaning "in the future." Both are archaic, but fun and Shakespearean.
The opposite of since may be before or until(either can mark an endpoint of a past activity). The difference is that before can be a standalone adverb.
moreover, really that's a word!
Nouns do not have opposites; 'ecosystem' is a noun. Therefore, ecosystem does not have an opposite. If nouns don't have an opposite... well, "top" is the opposite of "bottom", and they are referring to locations, hence they are nouns.
An opposite of the word "to" is from.
Epoch is an age signifying change, a new era. Hence, it has no active antonym.
The opposite of up is down. So, opposite of the opposite of up is up itself.
The opposite of the opposite is the original value, -9.
Antipodes are the opposite ends of the Earth, and hence of anything. Antipode and antipodal derive from it.
I believe it is one who prosecutes, hence prosecutor.
A pop shove-it in the opposite stance (a fakie stance, hence the name)
Displacement is a vector quantity. Hence, while finding resultant vector we need to use vector algebra and the properties of vectors. If the 2 displacement vectore are in opposite directions,it means that the angle between them is 180degrees and hence we can directly subtract them.
Negative in English terms means "opposite." Multiplication can represent "of". So, negative times negative is the "opposite of the opposite." And the opposite of an opposite is the same, hence positive, because "same" is the opposite of "opposite" and positive is the opposite of negative. So if you put it into English words, it actually makes some sense. In essence, negative and negative "cancel out."
Nouns do not have opposites; 'ecosystem' is a noun. Therefore, ecosystem does not have an opposite. If nouns don't have an opposite... well, "top" is the opposite of "bottom", and they are referring to locations, hence they are nouns.
I believe the relationship has to do with heat expanding molecules and maybe the opposite. Hence the pressure and temperature relationship.
Median is the line drawn from the vertex to the mid point of the opposite side. Hence there are three medians possible.
The opposite of it's dorsal. The Dorsal is the back, Ventral is the Front. Hence the dorsal fin on ocean-based organisms
Remarkable... Here is a decent definition; Worthy of being remarked or noticed; noticeable; conspicuous; hence, uncommon; extraordinary. :)
SATEN means peace! SATEN is opposite to SATAN that is evil. Hence SATEN is someone having a kind and peaceful soul.
because current flows in the opposite direction of the flow of electron.since electrons are negatively charged particle they moves towards the positive and hence current flows in the opposite direction to the flow of electrons (that is from positive to negative)