Elements of verse rhythm. The simplest metrical unit is the syllable; the next higher unit is the foot, a group of syllables; the next higher unit the line, a group of feet; then the stanza or strophe.
In some prosodies—as the French and Italian, for example—the standard unit of verse is the syllable. The first essential of a line is that it have a certain number of syllables; the accents or stresses may, theoretically at least, fall anywhere in the line. In English verse also the syllable has sometimes been regarded as the unit, but for the most part only by a few poets and prosodists of the late sixteenth, the seventeenth, and eighteenth centuries.
The foot corresponds in English verse to what has been described in Chapter I as the rhythmic unit of all rhythms, namely that which recurs in regular sequence. It comprises, therefore, a point of emphasis and all that occupies the time-distance between that point of emphasis and the following one. In other words, a foot is a section of speech-rhythm containing a stressed element and an unstressed element, usually one or two unaccented syllables. So much is clear and undisputed in theory. But there are few single topics on which writers on English prosody are so much at variance as on the further, more accurate definition of the foot. One of the main sources of difficulty, however, is easily removed. The metrical foot is not a natural division of language, like the word or the phrase, but an arbitrary division, like the bar in music, an abstraction having no existence independent of the larger rhythm of which it is a part. The analogy between the metrical foot and the musical bar is very close: they are both artificial sections of rhythm which either in whole or in part may be grouped into such phrases as the ideas or melodies may require.[23] They may be isolated and treated by themselves only for the purposes of analysis, for they are merely theoretical entities, like the chemical elements. There is no reason, therefore, that the foot should correspond with word divisions, no objection to the falling of different syllables of one word into different feet. Thus in Gray's line
The cur | few tolls | the knell | of part | ing day
both curfew and parting are divided.[24] Further, the division between clauses may fall in the middle of a foot, as in Wordsworth's lines
The world | is too | much with | us; late | and soon
Getting and spending we lay waste our powers.
But another difficulty remains, which is apparent in the second line just quoted from Wordsworth. The general rhythm of the whole sonnet of which these two lines are the beginning is plainly duple rising, or iambic. The first line and the latter part of the second are easily divisible into iambs; but how shall Getting and spend- be divided? Clearly and spend- is an iamb, but Getting is not. Can trochees and iambs occur together in the same line without either obscuring or actually destroying the rhythm? The simpler solution would be to keep the whole line in rising rhythm by regarding -ing and spend- as the second foot and ‸ Gett- as the first. (The sign ‸ indicates a missing syllable or musical rest. See below, page [63].)
The most common feet are the iamb, the trochee, the anapest, and the dactyl (see above, page 38), to which may be added the spondee. The names are borrowed, not quite felicitously, from classical prosody. Various symbols are in use:
| Foot | Symbols | Examples | ||
| iamb | ◡ _̷ | X / | xa | alone, despair, to walk. |
| trochee | _̷ ◡ | / X | ax | study, backward, talk to. |
| anapest | ◡ ◡ _̷ | X X / | xxa | interdict, to permit, |
| dactyl | _̷ ◡ ◡ | / X X | axx | tenderly, after the. |
| spondee | _̷ _̷ | / / | aa | stone deaf, broad-browed. |