Sentio: To Feel or Think

Sentiō means “perceive,” “feel,” “notice,” or “think.” Its principal parts are sentiō, sentīre, sēnsī, sēnsum. The present follows the fourth conjugation; the perfect and supine use sēns- rather than preserving senti-. Learn this as a stem alternation, not as a productive contraction that can be applied to any fourth-conjugation verb.

Its meanings form a natural chain: sensory perception leads to awareness, then to a considered feeling or opinion. English may require “hear,” “notice,” “realize,” or “think,” depending on what is perceived.

Complete Active Paradigm

Early comedy sometimes contracts perfect sēnsistī to sēnstī. Standard prose composition can safely use the full form; the shorter form matters chiefly for reading and scansion.

First-person sentiam is future indicative or present subjunctive. Future context gives “I shall perceive”; a potential, purpose, or other subordinate environment gives the subjunctive.

Passive Voice

The perfect passive uses sēnsus, -a, -um plus sum: sēnsus est, sēnsa erat, sēnsa erunt; sēnsus sit, sēnsa esset. Impersonal sentītur is useful for a generally perceived effect; personal forms occur when the perceived thing is the grammatical subject.

Imperatives and Non-Finite Forms

Present commands are sentī, sentīte. Future imperatives sentītō, sentītōte, sentiuntō and passive commands are (formal/archaic).

The gerundive is grammatically possible but less common than straightforward active phrasing, because sensation is not normally presented as an obligation. A reference paradigm should distinguish possible morphology from frequent usage.

Sensory Perception and Awareness

The perceived thing is accusative. A simultaneous event may appear as accusative plus present infinitive: terram movērī sentiō “I feel the earth moving.” A completed realization often uses perfect sēnsī with accusative-and-infinitive.

When the content is an open question rather than an asserted fact, an interrogative word introduces a subjunctive clause. Thus sentiēs quam gravis sit labor means “you will realize how difficult the task is”; the subjunctive marks the embedded question or exclamation, not uncertainty about the sensation.

See accusative-and-infinitive for how the accusative subject and relative tense work together.

An ex phrase can identify evidence, while in plus ablative can locate the sign perceived. Neither is a fixed object marker: the core object remains accusative or propositional.

Opinion and Alignment

From “perceive,” sentiō extends to “think, hold an opinion.” Dē plus ablative marks the topic; cum plus ablative can identify the person whose view one shares.

The idiom idem sentīre means “hold the same opinion”; aliter sentīre means “think differently.” English “feel that…” often expresses a mild opinion, but Latin still ordinarily uses accusative-and-infinitive for a full proposition.

Compounds

The family preserves -senti- / -sēns-: cōnsentiō, cōnsentīre, cōnsēnsī, cōnsēnsum “agree”; dissentiō “disagree”; praesentiō “perceive beforehand.” The deponent assentior “assent” belongs to the same semantic family but follows deponent morphology and commonly takes a dative.

Compound meanings are lexical: cōnsentiō is not merely “feel together,” and its complement patterns should be learned with the verb.

Sentiō and Its Neighbors

Sentiō starts from sensation or subjective awareness. Intellegō presents intellectual grasp or inference; putō offers a judgment; sciō states knowledge. Context may allow more than one, but a physical stimulus strongly favors sentiō.

Aspect and the Moment of Perception

Imperfect sentiēbam presents a sensation continuing or developing; perfect sēnsī can mark the instant at which a speaker noticed something. This is why English often translates the same lexical verb with different expressions.

The perfect does not necessarily mean that the sensation ended; it can bound the act of becoming aware. Likewise, opinion sentiō may be stable rather than momentary. Translate from aspect and context, not from a single English gloss.

Parsing Diagnostic

Identify present senti-, perfect sēns-, or supine/participial sēns-. Then ask whether the object is a stimulus, a perceived event, or an opinion. Look for dē marking a topic and cum marking alignment. In compounds, preserve the perfect -sēns- rather than inventing -sentīv-.

Common Mistakes

Inventing a regular perfect

Using ut for a perceived statement

Omitting dē before a topic

Regularizing a compound’s perfect

Key Takeaways

• Memorize sentiō, sentīre, sēnsī, sēnsum.
• The verb ranges from bodily perception through awareness to opinion.
• Opinions about a topic often use dē plus ablative; perceived propositions use accusative-and-infinitive.
• Compounds normally retain the -sēns- perfect and supine pattern.