| v. |
| [1] |
concentrate
,
escalate
,
step up
,
focus
,
sharpen
,
whet
,
strengthen
,
reinforce
,
heighten
,
escalate
,
deepen
,
quicken
,
emphasize
,
magnify
,
increase
,
augment
,
double
,
redouble
,
heat up
,
(Colloq) step up
,
(Brit) hot up
|
| [2] |
compound
,
heighten
,
deepen
|
| [3] |
deepen
|
|
