Cadō means “fall,” “drop,” “collapse,” “perish,” or figuratively “befall” and “come under.” Its principal parts are cadō, cadere, cecidī, cāsum. The present stem cad-, reduplicated perfect cecid-, and supine stem cās- must be distinguished carefully from the forms of caedō “cut, kill.”
Simple cadō is intransitive: the subject falls; it does not act on a patient. Consequently it has no ordinary personal passive. Impersonal passive morphology is grammatically possible, but it is far less useful than the active forms and should chiefly be recognized rather than imitated.
Active Indicative
| Tense | 1st sg. | 2nd sg. | 3rd sg. | 1st pl. | 2nd pl. | 3rd pl. |
|---|---|---|---|---|---|---|
| Present | cadō | cadis | cadit | cadimus | caditis | cadunt |
| Imperfect | cadēbam | cadēbās | cadēbat | cadēbāmus | cadēbātis | cadēbant |
| Future | cadam | cadēs | cadet | cadēmus | cadētis | cadent |
| Perfect | cecidī | cecidistī | cecidit | cecidimus | cecidistis | cecidērunt |
| Pluperfect | cecideram | ceciderās | ceciderat | ceciderāmus | ceciderātis | ceciderant |
| Future perfect | ceciderō | cecideris | ceciderit | ceciderimus | cecideritis | ceciderint |
Pōmum ex arbore cadit.
An apple is falling from the tree.
Nix tōtā nocte cadēbat.
Snow was falling all night.
Sine auxiliō pons cadet.
Without help the bridge will collapse.
Mīles in prīmā aciē cecidit.
The soldier fell in the front line.
Imperfect cadēbat presents a fall in progress, repeated falling, or background conditions; perfect cecidit presents the event as complete. In military narrative, “fell” commonly implies “was killed,” but the grammar remains active: the soldier is the subject who fell.
Active Subjunctive
| Tense | 1st sg. | 2nd sg. | 3rd sg. | 1st pl. | 2nd pl. | 3rd pl. |
|---|---|---|---|---|---|---|
| Present | cadam | cadās | cadat | cadāmus | cadātis | cadant |
| Imperfect | caderem | caderēs | caderet | caderēmus | caderētis | caderent |
| Perfect | ceciderim | ceciderīs | ceciderit | ceciderīmus | ceciderītis | ceciderint |
| Pluperfect | cecidissem | cecidissēs | cecidisset | cecidissēmus | cecidissētis | cecidissent |
Present cadam can be future indicative “I shall fall” or present subjunctive “I may fall.” The clause, not the visible form alone, supplies the analysis.
Tene rāmum nē cadās.
Hold the branch so that you do not fall.
Timēbāmus nē turris caderet.
We feared that the tower might fall.
Voice: Why the Personal Passive Is Missing
English “was felled” is passive, but it corresponds to transitive caedō or another causative verb, not to passive cadō. Since simple cadō has no accusative patient, forms such as mīles caditur cannot mean “the soldier falls.” Latin simply uses active mīles cadit.
An impersonal passive can theoretically foreground the event of falling. Its present system would be caditur, cadēbātur, cadētur; cadātur, caderētur; its perfect system uses fixed neuter cāsum est, cāsum erat, cāsum erit; cāsum sit, cāsum esset. Such forms are (rare/marked) beside ordinary active cadit and cecidit. They do not form a personal paradigm and are not the default way to describe someone falling.
Commands and Non-Finite Forms
Present imperatives are cade, cadite, though a positive command to fall is pragmatically uncommon. Future caditō, caditōte, caduntō is (formal/archaic).
| Category | Form/status |
|---|---|
| Present infinitive | cadere |
| Perfect infinitive | cecidisse |
| Future infinitive | cāsūrum esse |
| Present participle | cadēns, cadentis |
| Future participle | cāsūrus, -a, -um |
| Gerund | cadendī, cadendō, cadendum, cadendō |
| Gerundive | cadendum, only impersonal when verbal |
| Supines | cāsum, cāsū; limited in ordinary prose |
Vīdimus arborem in viam cadere.
We saw the tree fall into the road.
Dīxit multōs in proeliō cecidisse.
He said that many had fallen in battle.
Mūrus iam cāsūrus esse vidētur.
The wall seems to be about to fall.
The stem cās- is especially valuable for cāsūrus and the noun cāsus “fall, occurrence, chance.” Do not use cāsus est as a substitute for active perfect cecidit. A resultative adjective may describe something as fallen, but the normal finite event is expressed actively.
Source, Goal, and Setting
The point from which something falls uses ā/ab, ē/ex, or dē plus ablative. Motion into or onto a place can use in plus accusative; the setting in which a fall occurs can use in plus ablative. These phrases encode different spatial relations.
Lapis dē mūrō in viam cecidit.
A stone fell from the wall into the road.
English often uses one “from” construction, but Latin distinguishes emergence from within (ex arbore) and descent from a surface or height (dē mūrō). For the source system, see the ablative of separation.
Death, Defeat, and Figurative Falling
In historical prose, in proeliō cadere means fall in battle and normally implies death (military). The expression does not grammatically say who killed the person. To name an agent who kills, use a transitive verb such as caedō with active or passive syntax.
Centum mīlitēs in eō proeliō cecidērunt.
A hundred soldiers fell in that battle.
Figurative phrases commonly use in plus accusative: in metum cadere “fall into fear,” in suspīciōnem cadere “come under suspicion,” in potestātem cadere “fall into someone’s power.” The goal metaphor explains the accusative.
Post illud factum in gravem suspīciōnem cecidit.
After that deed he came under grave suspicion.
Compounds—and the Crucial Contrast with caedō
Compounds of cadō generally weaken the root vowel and often lose reduplication: accidō, accidere, accidī “fall upon; happen”; dēcidō “fall down”; incidō “fall into”; occidō, occidere, occidī, occāsum “fall, set, perish”; recidō “fall back.” Unlike most compounds listed here, high-frequency impersonal accidō has no Classical supine; do not invent accāsum. Impersonal accidit is a standard way to say “it happens.”
Saepe accidit ut cōnsilia mūtentur.
It often happens that plans are changed.
Macrons distinguish compounds that collapse in ordinary typography. Occidō with short i means “fall, perish,” while occīdō from caedō means “cut down, kill.” Likewise incidō is “fall into,” but incīdō is “cut into.” Ancient manuscripts do not print macrons, so syntax and context remain essential.
Parsing Diagnostic
Identify cad-, cecid-, or cās-. Determine whether the form is active—the normal case—or a rare impersonal passive. Read source and goal phrases before selecting a literal or figurative sense. With compounds, check vowel quantity and principal parts so that “fall into” is not confused with “cut into.”
Common Mistakes
Inventing the perfect from the present stem
❌ Mīles in proeliō cadīvit.
Incorrect — adding fourth-conjugation -īv- does not produce the perfect; use cecidit.
✅ Mīles in proeliō cecidit.
The soldier fell in battle.
Using a personal passive to mean “fall”
❌ Arbor ventō caditur.
Incorrect — the tree itself falls, so cadō remains active.
✅ Arbor ventō cadit.
The tree falls because of the wind.
Confusing cadō with caedō
❌ Agricola arborem cadit.
Incorrect for ‘the farmer cuts down the tree’ — cadit means ‘falls.’
✅ Agricola arborem caedit.
The farmer cuts down the tree.
Confusing the two reduplicated perfects
❌ Hostis ab equō cecīdit.
Incorrect quantity for ‘the enemy fell’; cecīdit belongs to caedō ‘cut/kill.’
✅ Hostis ab equō cecidit.
The enemy fell from his horse.
Key Takeaways
- Memorize cadō, cadere, cecidī, cāsum.
- The thing that falls is an active subject; ordinary personal passive forms are unavailable.
- Source, goal, and figurative in phrases organize the verb’s common meanings.
- Vowel quantity and principal parts distinguish cadō compounds from compounds of caedō.
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