“passable” vs. “passible”
Use "passable" for anything adequate or capable of being crossed (the everyday word), and reserve "passible" for the rare technical sense of capable of suffering or being emotionally affected, mostly in theology and philosophy.
passable
"Passable" is a common adjective meaning adequate or good enough to get by, though not excellent — a passable meal, a passable attempt at French. It also carries a more literal, older sense of "capable of being passed through or crossed," as in a passable road or a passable river ford. It's built from the verb "pass" plus the suffix "-able," a straightforward native-English formation with no unusual etymological twist.
passible
"Passible" is a rare, mostly theological and philosophical adjective meaning capable of feeling, suffering, or being emotionally or physically affected by outside forces — the opposite of "impassible," a much more common word describing something incapable of suffering or emotion (used, for instance, in Christian theology to debate whether the divine nature can suffer). "Passible" comes from Latin "passibilis," built on "pati," meaning to suffer or endure, the very same root that gives English "passion" and "patient."
The real distinction
These two are almost never confused in practice because "passible" is so rare that most fluent English speakers will go their whole lives without needing it outside a philosophy or theology class, while "passable" is an everyday word used constantly to mean "acceptable" or "good enough." The real trap is spelling: someone trying to write the common word "passable" might see "passible" in a spell-checker's suggestion list or in an old theological text and assume it's simply a variant spelling, when in fact the two words come from entirely unrelated Latin roots and mean completely different things. "Passable" descends from "pass" (to go by or through), while "passible" descends from "pati" (to suffer), making them etymological strangers that happen to look like typos of each other. If you are describing food, a performance, a road, or anything being judged as merely adequate, "passable" is virtually always correct. If you are writing theology, philosophy, or a discussion of whether a being can experience suffering or emotional change, "passible" (and its far more common antonym "impassible") is the specialized term you want. Style guides rarely even list "passible" because its use is so confined to specific academic and religious contexts, whereas "passable" appears in ordinary conversation and writing every day.
Examples with “passable”
- His attempt at the recipe was passable, if not memorable.
- The old bridge is barely passable after the flood.
- She gave a passable performance despite limited rehearsal time.
- The mountain pass remains passable only in summer.
- His grasp of Spanish is passable but far from fluent.
- The road turned passable again once the snow melted.
- It was a passable first draft that needed real revision.
- The dirt track is only passable in dry weather.
Examples with “passible”
- The theologian argued that a passible God could truly share in human grief.
- Philosophers debate whether passible beings can also be perfectly good.
- The essay explored passible versus impassible conceptions of the divine.
- Some traditions insist the divine nature is passible and moved by prayer.
- The lecture contrasted passible emotion with impassible detachment.
- Ancient debates over a passible deity shaped early doctrinal disputes.
- The professor asked students to define passible before the exam.
- Their argument hinged on whether suffering requires a passible subject.
Memory trick
Link "passable" to "pass": if something can pass a test, pass through a gate, or just barely pass muster, it's "passable," plain and simple. For "passible," remember its hidden kinship with "passion" and "patient" — both trace back to Latin "pati," to suffer — so a "passible" being is one capable of that same suffering or being emotionally acted upon. Since "passible" shows up almost exclusively next to its opposite, "impassible," seeing that pairing in a sentence is itself a strong signal you're in the rare theological territory rather than describing an adequate soup or a driveable road. When in doubt, remember that outside a seminary classroom you will almost certainly want "passable," since the odds of genuinely needing the theological term in everyday writing are vanishingly small.