On gloss:

lasna in sense "fasten"
x1 (agent) fastens/connects/attaches/binds/lashes x2 to x3 with fastener x4.

In definition:

cikre
x1 repairs/mends/fixes x2 for use x3.
mi'ircikre
c1 repairs/mends/fixes/maintains c2 for use m2=c3
voisne
x1=s1=v1=ko'a dreams that they are flying (x2=s2="lo du'u ko'a vofli" fixed) by means x3=v2; x2 is a flying dream of x1; x1 has flying dream x2.
vi'oi'au (exp!)
mekso unary operator: the set of all fixed points of function a
fancuvitno
x1 is a fixed point of function x2
icki
x1 “rearranges/shifts/shuffles the deck chairs on the Titanic/is bikeshedding,” with action x2, which is pointless by standard x3 for fixing problem x4.

In notes:

dornilteikezraifaufa'a
x1 is the temporal direction of/toward solstice x2 (event or spacetime coordinates or season (usually specify year); default: Summer solstice) from origin/in reference frame x3 at location/for body x4 and with respect to orbit/sun x5.
xlajvo
x1 is a bad/poorly-made lujvo with issue x2, bad according to x3 and by standard x4
da'a'au (exp!)
mekso operatory: prime mark append
ji'i'u (exp!)
mekso, at-most-5-ary operator: a rounding function; ordered input list is (x,n,t,m,b) and the output is sgn(x) bt roundn (b(-t) abs(x)), with rounding preference n and where the fractional part of b(-t) abs(x) being equal to 1/2 causes the roundn ( ) function to map b(-t) abs(x) to the nearest integer of form 2Z+m, for base b (determined by context if not explicitly input) and some integer Z (determined by context).
mu'i'u (exp!)
base-dependent digit: representing exactly one half of one more than the maximum possible single-digit number expressible in the relevant number base
rai'i (exp!)
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)
su'i'o (exp!)
mekso unary or binary operator: ordered inputs (n, b) where n and b are nonnegative integers and b > 1; output is the ultimate digital root of n in base-b.
vu'ai (exp!)
base-dependent digit: the maximum possible single-digit number expressible in the relevant number base.
aigne
x1 is an eigenvalue (or zero) of linear transformation/square matrix x2, associated with/'owning' all vectors in generalized eigenspace x3 (implies neither nondegeneracy nor degeneracy; default includes the zero vector) with 'eigenspace-generalization' power/exponent x4 (typically and probably by cultural default will be 1), with algebraic multiplicity (of eigenvalue) x5
tartidu
x1 is directly/linearly proportional to x2 via coefficient/constant of proportionality x3 and background/constant offset x4; there exists constants x3 and x4 such that x1 = x3×x.
tcaudu
x1 is the formatted address for something - (with format) starting with x2, which is an address/locality/administrative subunit/region which belongs to slightly broader address/locality/administrative subunit/region x3, which in turn itself belongs to a slightly broader address/locality/administrative subunit/region x4, \dots (etc.).
tseingu
x1 (node in a tree graph) and x2 (node in the same tree graph) have an essentially unique most recent (graph-nearest) common ancestor node A such that x3 [nonnegative integer; li] is the minimum element of the set consisting only of d(A, x1) and of d(A, x2), and such that x4 [integer; li] is d(A, x1) - d(A, x2), where d is the graph geodesic distance (defined to be infinite if nodes are not connected in the correct direction).
zdeltakronekre
x1 is a Kronecker delta function defined on structure x2 which evaluates to one for any argument belonging to subset x3 and which evaluates to zero otherwise