Some of the commonest prefixes used in alliteration are[57]: _and_, _æfter_, _eft_, _ed_, _fore_, _forð_, _from_, _hider_, _in_, _hin_, _mid_, _mis_, _niðer_, _ongēan_, _or_, _up_, _ūt_, _efne_, as in compounds like _ándswarian_, _íngong_, _ǽfterweard_, &c.: _on =á=ndswáre and on =é=lne stróng._ Gū. 264. _=ǽ=ðelīc =í=ngong =é=al wæs gebúnden._ Cri. 308. _and =ḗ=ac þāra =ý=fela =ó=rsorh wúnað._ Met. vii. 43. _=ú=plang gestṓd wið =Í=srahḗlum._ Ex. 303. Prefixes which do not take the alliteration are: _ā_, _ge_, _for_, _geond_, _oð_, e.g. _ā=h=ōn and ā=h=ébban on =h=ḗahne bḗam._ Jul. 228. _hǽfde þā ge=f=óhten =f=óremǣrne blǣ́d._ Jud. 122. _=b=rónde for=b=ǽrnan ne on =b=ǣ́l hládan._ Beow. 2126. The following fluctuate: _æt_, _an_, _bī_ (_big_), _bi_ (_be_), _of_, _ofer_, _on_, _tō_, _under_, _þurh_, _wið_, _wiðer_, _ymb_. These are generally accented and alliterate, if compounded with substantives or adjectives, but are not accented and do not alliterate if compounded with verbs or other particles,[58] e.g. _óferhēah_, _óferhȳd_, but _ofercúman_, _oferbī́dan_. The following lines will illustrate this: (_a_) prefixes which alliterate: _þāra þe þurh =ó=ferhȳ́d =ú=p āstī́geð._ Dan. 495. _=á=tol is þīn =ó=nsēon hábbað we =é=alle swā́._ Satan 61. _=ý=mbe-síttendra =ǣ́=nig þā́ra._ Beow. 2734. (_b_) prefixes which do not alliterate: _oððæt he þā =b=ýsgu ofer=b=íden hæfde._ Gū. 518. _ne wíllað ēow on=d=rǣ́dan =d=ḗade fḗðan._ Exod. 266. _=s=ýmbel ymb=s=ǣ́ton =s=ǣ́grunde nḗah._ Beow. 564.[59] When prepositions precede other prepositions or adverbs in composition, the accent rests on that part of the whole compound which is felt to be the most important. Such compounds fall into three classes: (i) if a preposition or adverb is preceded by the prepositions _be_, _on_, _tō_, _þurh_, _wið_, these latter are not accented, since they only slightly modify the sense of the following adverb. Compounds of this kind are: _beǣ́ftan_, _befóran_, _begéondan_, _behíndan_, _beínnan_, _benéoðan_, _búfan_, _bútan_, _onúfan_, _onúppan_, _tōfóran_, _wiðínnan_, wiðū́tan, _undernéoðan_.[60] Only the second part of the compound is allowed to alliterate in these words: _he =f=ḗāra súm be=f=óran géngde._ Beow. 1412. _ne þe be=h=índan lǣ́t þonne þu =h=éonan cýrre._ Cri. 155. Most of these words do not seem to occur in the poetry. (ii) In compounds of _þǣr_ + preposition the preposition is accented and takes the alliteration: _swā́ he þǣr=í=nne =á=ndlangne dǽg._ Beow. 2115. _þe þǣr=ó=n síndon =ḗ=ce drýhten._ Hy. iv. 3. (iii) _weard_, as in _æfterweard_, _foreweard_, _hindanweard_, _niðerweard_, _ufeweard_, &c., is not accented: _=h=wít =h=índanweard and se =h=áls grḗne._ Ph. 298. _=n=íodoweard and úfeweard and þæt =n=ebb líxeð._ ib. 299.