mekso (2 or 3)-ary operator: maximum/minimum/extreme element; ordered list of extreme elements of the set underlying ordered set/structure X1 in direction X2 of list length X3 (default: 1)
x1 (humanoid body) is in (reverse) Trendelenburg position with the feet higher than the head by x2 (angle measurement, measured relative to the horizontal; units must be specified).
x1 (experiencer/function) increases/gains/is incremented/augmented in property/quantity x2 such that it achieves/had achieved having that property at 'time' x3 (abstraction, number) according to standard x4
x1 (li) is a bound on set x2 (set) in direction x3 (li) in ordered structure x4; x1 bounds x2 from the x3 side in x4; x2 is bounded from the x3 side by x1.
x1 is a negative number (less than zero (0)), understood as a member of an ordered set with additive identity, such as the typical structure on the set of all real numbers.