ADJ
- deep, great, intense
- total
- a look of total concentration on her face
- poor
- exclusive
VERB + CONCENTRATION
- demand, require
- The game requires great concentration
- lose
- break, disturb
- Don's voice from outside broke my concentration
PREP
- ~ on
- his concentration on his writing
PHRASES
- a lack of concentration, a lapse in/of concentration
- One momentary lapse in concentration could prove fatal
- powers of concentration
- She has great powers of concentration for a child her age
ADJ
- great, heavy, high, large
- The greatest concentration of traffic is in the city centre
- low
- geographical
CONCENTRATION + VERB
- increase, rise
- The concentration of nitrates in the drinking water has risen in recent years
- decrease, fall