insoluble

As a letter s

is the letter s with a.

As an adjective insoluble is

that cannot be dissolved.

Insoluble is a related term of puzzling.

As adjectives the difference between insoluble and puzzling

is that insoluble is that cannot be dissolved while puzzling is difficult to understand or explain; enigmatic or confusing; perplexing.

As a verb puzzling is

.

As a noun puzzling is

time spent pondering something confusing.

As an adjective insoluble

is that cannot be dissolved.

As a verb dissolve is

to terminate a union of multiple members actively, as by disbanding.

As a noun dissolve is

(cinematography) a film punctuation in which there is a gradual transition from one scene to the next.

As adjectives the difference between insoluble and abstruse

is that insoluble is that cannot be dissolved while abstruse is concealed or hidden out of the way; secret.

As adjectives the difference between insoluble and inaccessible

is that insoluble is that cannot be dissolved while inaccessible is not able to be accessed; out of reach; inconvenient.

As a noun inaccessible is

an uncountable regular cardinal number that is a limit cardinal.

As adjectives the difference between insoluble and cryptic

is that insoluble is that cannot be dissolved while cryptic is having hidden meaning.

As a noun cryptic is

a cryptic crossword.

As adjectives the difference between dissoluble and insoluble

is that dissoluble is which can be dissolved or disintegrated while insoluble is that cannot be dissolved.

As adjectives the difference between insoluble and impassable

is that insoluble is that cannot be dissolved while impassable is incapable of being passed over, crossed, or negotiated.

As adjectives the difference between insoluble and unsolved

is that insoluble is that cannot be dissolved while unsolved is not yet solved.

As adjectives the difference between undissolvable and insoluble

is that undissolvable is not dissolvable while insoluble is that cannot be dissolved.