The most selfish one word 'I' - avoid it
Most satisfactory two letter 'WE' - use it
Most poisonous three letter 'EGO' - kill it
Most used four letter 'LOVE' - value it
Most pleasing five letter 'SMILE' - keep it
Fastest spreading six letter  'RUMOUR' - ignore it
Hardworking seven letter 'SUCCESS' - achieve it
Most enviable eight letter 'JEALOUSY' - distance it
Most powerful nine letter 'KNOWLEDGE' - achieve it
Most divine ten letter 'FRIENDSHIP' - maintain it