arsis
The stronger part of a musical measure: the part containing the beat.
countable, uncountable
The stronger part of a metrical foot: the part containing the long (heavy) syllable in quantitative meter, or the stressed syllable in a qualitative meter.
countable, uncountable
it comes to pass that the arsis may effect some change in the order of which it is itself the commencement
The elevation of the hand, or that part of the bar at which it is raised, in beating time; the weak or unaccented part of the bar, opposed to the thesis.
countable, uncountable
The elevation of the voice to a higher pitch in speaking.
countable, uncountable
Where it comes from
From Ancient Greek ἄρσις (ársis, “lifting”), from αἴρω (aírō, “to lift”).
Adapted from the Wiktionary entry arsis (CC BY-SA 4.0).