3. ultra-
① 表示“极端, 过份”
Ultrapure Ultramilitant Ultraclean Ultrareactionary Ultraliberal
② 超过某一限度﹑ 范围等
Ultrasonic Ultramodern Ultramundane Ultrared Ultraviolet
10. sub-
① 表示“在下面，次一等，副手”
subdue subjugate subliminal submerge submissive subordinate suborn subscribe
subside subterranean subcontinent subtropics subtitle subeditor suboffice
③ 表示“职位低”
Underagent Underofficer underling
2. un-
① 表示“不，无，非，没有”
Unreal Unequal Unfortunate Unabashed Unassuming Uncommitted Untoward Unconditional Unlimitted Unambitious
surplus Surcharge surveillance survival
9. suc-/suf-/sup-/sur
在同辅音词根前表示“在…下面”
succeed succinct succumb sufficient suffer
suffocate suffuse supplant supplicate supplicant support suppress
② 表示“接近，靠近”
subcentral subarctic subadult subacid subarid
11. se-
表示“分开，离开，区别开”
secede seclude secrete sedition
seduce segregate sever select
4. trans-
① 表示“横过，越过”
Transcontinetal Transnormal Transcend Transgress Transmit Transparent Transect
②进入另一处或另一状态
Tranplant Transaction Transcribe transfigure Transfuse Transitory Transmogrify
1. under-
① 表示“在…下”
underground underwrite Underline Undersea undermine underclothing underwear
② 表示“不足，不够”
Underestimate Underplay Underpopulated Underdeveloped Undersized
5. sym-/syn-
表示“共同，相同”
Sympathy Symphony Symmetry Symbiosis Symposium
Synchronous Synonym Synthesis Synopsis Syndrome
表示“在…下面”
Susceptible Susceptive Suspect Suspend
Unconscionable Unfailing Unofficial Unjust Unworldly Uneducated Uncivilized Undecided Unalloyed Uncharted
② 表示“打开，解开，弄 出”reverse/opposite
Unlock Unbind Unbutton Uncover Undress Untomb Unearth Unbosom Unravel
6. sus
Suspense Suspire Sustain Sustenance
7. super-
① 表示超级，超过，过度”
Supersized Supersonic Supernatural Superfluous
Supercilious Supersensitive Supercharge
② 表示“在…上面”
Supervise Superstructure Superimpose superficial
superintend Supersede Superstition
8. sur-
表示“超过，在上面”
surface surpass Surrealism Surmount
後; 向後; 在後
retrograde retrogress retrospect retroaction retroject retrovert
12. retro-